Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d689ce3f84a589e…

MALICIOUS

PDF

81.2 KB Created: 2021-09-14 12:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d4ab85015c4363ace6be31bcbd65ff75 SHA-1: 4cbe6d076a1b33b2672376473e7512a61d383d7d SHA-256: 7d689ce3f84a589ee76eab0fc70878d419c503e4e6d9dd618f585d3b22f49080
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting it's part of a phishing or scam campaign. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in tech-support scams or payment fraud lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://greenworx.eu/images/uploads/files/najofefadogulenimadavasez.pdf In PDF document text
    • http://bippex.com/filespath/files/20210907200433.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/gasalopufipux.pdfIn PDF document text
    • https://abbma.in/admin/uploads/file/33081554311.pdfIn PDF document text
    • http://pscworld.eu/ckfinder/userfiles/files/34674199899.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/fekinusageturaweresef.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/32417662266.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a172e5b699---xemiz.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/77120263230.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613693238b940---boraridejet.pdfIn PDF document text
    • http://lafiestadelmoto.cz/files/file/60573332834.pdfIn PDF document text
    • https://yunglin.com/uploadpic/files/70983513380.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/sanomibugetibijetavu.pdfIn PDF document text
    • http://turnyras.lt/Files/file/rulula.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/20091051489.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202109/1630732712.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/157291eb8ef67d830cf540c7379ec094/puxav.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/zasasuforewuxo.pdfIn PDF document text
    • https://marblo.marblobaths.ph/app/webroot/img/files/dukijatizelunafebadakajuf.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/81063267343.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/41c84e69276061ed321ad42ce281fea7/kirefuluvuzojo.pdfIn PDF document text
    • https://breedlife.com/upload/files/2661581830.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=brisbane+telephone+directory+residentialPDF link annotation
    • 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_off0000d73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73A 10920 bytes
SHA-256: 61dfbfca89f9fa2a493a9078bdda8024d8fa9872ed767970a2f6ba7b0256dbe5
font_01_sfnt_off0000f04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001085d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085D 17888 bytes
SHA-256: e2cd11b60ab4dcbb90f82761cd672d815d8a6b889284d50c91951436d5e72393

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