Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d78c7c30ab89dd…

MALICIOUS

PDF

86.4 KB Created: 2021-07-01 12:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9a1b266f54bb7b042c1f808960a7ad9d SHA-1: e7aadb2d9a0d2d476d8ebb8963fb775c12d4d73b SHA-256: 20d78c7c30ab89dd605e286223a29210dbd66f18070ef89e57ea89101181274b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a callback phishing lure. It contains numerous embedded URLs pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or redirect users. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing attempt designed to trick users into initiating contact.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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) or Microsoft license-boilerplate 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 https://nomylo.ru/uplcv?utm_term=cactus+pipe+national+monument PDF link annotation
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcef39577ce---xulemabu.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608abacf01207---vidumukevojajutaresoru.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7ac0305b8---sukefigabepuzivubadupig.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3dc6fb9fcd---41027483578.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/87546805664.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/jumaxajakewo.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/maxoxi.pdfIn PDF document text
    • https://anfauglir.com/images/file/9851154266.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/90628394598.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160712636acb66---28351958421.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/43189906872.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/9b4dc9e3c7079ac1d8a19f53b3a50495/77397027895.pdfIn PDF document text
    • http://cycling-software.com/files/file/lujor.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210623_B79769281B0E4E69.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/6n03aqrc9dl6njdhdrqva1l9e3/rozitodujekexakevelo.pdfIn PDF document text
    • http://ipublicity.cz/data/file/51015988667.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d83001439eb---mefurozub.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e14badb2d---53986154983.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/tivugivusetudo.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/45766956407.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771d0130e59---48810405362.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0ec419d20---9474037973.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/eb82ea1fb82c8b184006ece6ed556c42/49499079008.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3E 17736 bytes
SHA-256: 30e514034b437e9f72c49d300546741ad9925e178c0f51fc29a271ce7112b482
font_01_sfnt_off00011ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E7 10564 bytes
SHA-256: fc9039a358b61a4c6f8e10640d3f254e1e25b195e70d294de1dbe87c295c1fde

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