Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05014a9f37eb75d…

MALICIOUS

PDF

82.7 KB Created: 2021-09-01 23:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 07419bbae42df07fc7e08ff9218f26a8 SHA-1: 3209ea8612bb5bc1c59a167527e1c39d7e59ee56 SHA-256: f05014a9f37eb75d17158251d4ff85a2e443e917e45ea5b8984f44c8bf783d56
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL findings are sufficient to infer a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://krisoc.ru/uplcv?utm_term=direct+selling+industry PDF link annotation
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcf7294ef8---darifofupipesematoxuzixe.pdfIn PDF document text
    • https://guijek.com/userfiles/file/24537583648.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c80a41a382---10036600251.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/ruxumadevuzuravugisap.pdfIn PDF document text
    • https://esz.jp/img/editor/files/navisubudurip.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/8938471495.pdfIn PDF document text
    • http://come2menorca.com/images/file/43315662744.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/0cb3c7c640afc16d943c17be6c80b461/90413959841.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/wepipuwem.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/9kbup4clcpnfgp1em7sh3bdcb2/turafujukawiruzin.pdfIn PDF document text
    • http://michelschuurmans.nl/images/uploads/file/zoxataxekit.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/gitoja.pdfIn PDF document text
    • http://lejonhund.com/upload/remaf.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/e68aa379d1d79bf9841525c57409367a/48488594477.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/0ed4e1dbcaf893d2ed155c2b7d30d11f/68762497078.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/21221254612.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/87098868409.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210825_8E6FE678E95220A9.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/75b77ab40de6da298dd0738bf95fc040/butarixatawuxavodojarir.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/61784149845.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/50860939660.pdfIn PDF document text
    • http://hyswimpool.com/userfiles/muwuj.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/1c981d60b88c2b303c2fa39dcb8209f8/27083188693.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/78108276416.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/lulimutegurulamin.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE028 17464 bytes
SHA-256: 5525b8a99d17a12f185e741883a7b945ad5256e3a312fb48e07e34e1397113a9
font_01_sfnt_off00010d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A7 10476 bytes
SHA-256: 4769ce228dfa477464f4796d6d6efa591505b0b49d7fd0c174e6ca80fc5ed781

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