Malicious PDF — malware analysis report

Static analysis result for SHA-256 172f40cbd0150446…

MALICIOUS

PDF

68.5 KB Created: 2021-09-29 06:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7882c4b574d56445bc8d9c3544c7c906 SHA-1: 9752c03d90cb399f064cc6ce01789eab620b3dff SHA-256: 172f40cbd0150446386a1a7ae648e10c28fb5ca42380f8426a5e8c39b311406d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=john+wick+putlocker PDF link annotation
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/9148115007.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/pelexukiliforob.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404eed9541d---lunuxega.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/54472664645.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/19389748623.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/75165075832.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/bemabamuwikularibise.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/19450173543.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/7f60bda684953e0f87917810f7f7317e/xapusokepotizefonajolaf.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/81992582254.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/42631922357.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/9882813dd5e85258146de4ba27e58772/98059263175.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/90301825817.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/161523b73641ad---bosorobufaliwejax.pdfIn PDF document text
    • https://maftplayer.net/calisma2/files/uploads/sejekuxulujotavusakax.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/fijowovag.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136174c2c04b---95097936013.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/48419455555.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/jujulufujef.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/pexezesopedotolosilaweti.pdfIn PDF document text
    • http://immopolignano.lu/images/somugokabidagipigikizi.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/2967471851.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/89378803196.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_off0000af2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC740 15520 bytes
SHA-256: 4c2aff1386cb1eb1f4b58faa8914a29c2f448233b36a590e89638417f0b38217
font_02_sfnt_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 10412 bytes
SHA-256: 04f92bcf64a1f14e5fbe4d235857451c1ba0cc04efbdcd967f2e2fb5ffe652ee

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