Malicious PDF — malware analysis report

Static analysis result for SHA-256 9523eebbbe3e9e2a…

MALICIOUS

PDF

107.0 KB Created: 2021-07-01 01:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c71543b85ecf6dc4818edc7485525fbd SHA-1: 20fa771578320abd77c5d4eacf9f260e06cab879 SHA-256: 9523eebbbe3e9e2a6bd5a06d9d28c5eaeee08dd40e76b26ff3be999506fe9e91
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress sites and other potentially malicious URLs. The presence of a 'download' button lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9330

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://synerhu.ru/uplcv?utm_term=cybernetic+transposition+pdf PDF link annotation
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/0f481b5e08155d34304ca0c94969dde7/luxojugoluresovirid.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b34e74791fd---mejixif.pdfIn PDF document text
    • http://bomtvplus.com/data/board/file/20210511151257.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16071caa82d937---notok.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a7af9ae53---nuwezudixuwuwojoxulev.pdfIn PDF document text
    • http://seamacros.com/upload/file/woratowagowetot.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/g793it2bps9g2mm54c7r9e74n6/koxakakebixakoborago.pdfIn PDF document text
    • http://praguetransfer.com/files/file/ripukubugesanubamugotufum.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/wolakewex.pdfIn PDF document text
    • http://lawyerstitleescrow.com/clients/9/9b/9b7cfcecb5e5abb6b877b2b1d59b4eb1/File/lovewimegabivupin.pdfIn PDF document text
    • http://iwishop.hu/file/sikajetinadowutep.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cca1827d42f---mafamojorozavedodexedumap.pdfIn PDF document text
    • http://armanetti.com/images/waverega.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/difoduxu.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/54363779036.pdfIn PDF document text
    • https://kalewebsatis.com/calisma2/files/uploads/52277365017.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/83bbc527345ee333d174297b0a761766/63868214175.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/4e85216796261f4f768800728fb159da/raxaluzipuvugobel.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/79160113611.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c76c9fc31ad---93750524897.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/6a2d31b62dc853bc446962063550a6e5/38138467229.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa661a0ce4---40403181465.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/nqosakibbgh695q8mi7tqpbp65/sivogesamomeravo.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3825ad57e9---33636973680.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075aad6e7c8c---51372888355.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/e0f10c0984aad1cf6cb7b803c84060ba/lusepezolelabufubikelag.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000120e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x120E2 16784 bytes
SHA-256: 3a255dde182a0f59ae82d35c2b9020a1adbc14c51e436e7a4e21725303197bc7
font_00_sfnt_off00011455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11455 3016 bytes
SHA-256: 45db3f36125efcb113dfe1e5335700e5eee80fbcd014de91b27c400dbd693761
font_02_sfnt_off000138ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138ED 20364 bytes
SHA-256: eee241429f7b084b6f721ebce48aa02058f1e7f4624a62d7fc0989fd20ef9f8a
font_03_sfnt_off00016ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000184c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184C0 10852 bytes
SHA-256: ac9b079c56cb7bd24e5aa8a1c763da5fa0f6579a270af3674434e43f0b9a1f60

Open this report in the interactive analyzer, or submit your own file for analysis.