Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e02ebff1a0d2a8…

MALICIOUS

PDF

88.3 KB Created: 2021-07-04 23:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 48206c7baeb29629d896afe24e58e4a1 SHA-1: d95a5981525f10e7e353685d4f535a23b2ed8e86 SHA-256: b2e02ebff1a0d2a8e8ff72dd7baff0f1a1205309b8d937e779e0ab4dca85e523
156 Risk Score

Malware Insights

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

The PDF document contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The document's structure as a link farm suggests an attempt to lure users to malicious sites.

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://garglob.ru/uplcv?utm_term=packet+sniffing+in+network+security PDF link annotation
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/laahmnl8gksokv08spto7i1ffo/74644715384.pdfIn PDF document text
    • http://jentretiens.ch/uploadimage/poxipumebevenidowobejunex.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e60b8bad4b---30951520020.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/ebd4i1c0lf5t5ha9gbecbf87dh/62056122320.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/7489927784.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/95404834757.pdfIn PDF document text
    • http://englishkan.net/UserFiles/File/37625399959.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/ravefapabugitu.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ets3c1caje28o4q1056qhjenk7/gemebagawajatimegiziku.pdfIn PDF document text
    • https://telenovella-bg.com/files/62341975158.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/95956696381.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/52259136913.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/lologujadepazikijavin.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/r44dhg3tnns85n46v73al975fd/busudamivavepuweg.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caa07750b0---41262671148.pdfIn PDF document text
    • https://pmms-online.com/assets/file/90912708462.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/66637415483.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/27bbd3030f4e154487345f61dbb68bb3/dazipoximenifasekesow.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/94b3269b1a7eb4b0b39a97cf094c5ec6/18862402725.pdfIn PDF document text
    • http://ausafe.net/images/art/files/61885534409.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073c87a99872---97808127999.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983894dd66c---33047718696.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_off0000f57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 10860 bytes
SHA-256: 538fd42797a3a20a560b530bd9a8728a22d065ccb2d6de1a75df546276566134
font_01_sfnt_off00010ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE1 17172 bytes
SHA-256: c8d0fbd38649c6b51ec943d3a54363216869eb594eb29bca58ad7b4fb88b0e21
font_02_sfnt_off00013bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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