Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94e293d1e9a546b…

MALICIOUS

PDF

95.2 KB Created: 2021-07-13 20:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f47d16b267e99690270d416fe960b48 SHA-1: 64b414adba75ba6d86d26d9524de6e437f61ce15 SHA-256: c94e293d1e9a546b9ef8fee8de6675ef7bfdfb0a5c04566e898d8ba81aa88e43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple URLs, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous links to potentially malicious content supports the classification as a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/xosininidiponisesozobiw.pdf
    • https://evpersoneli.net/ev-personeli/file/sisazogagijoxalumojimine.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/flr77kl26jgc83qpchkd79kmg4/lapunetedudasujekesuti.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609066f56f445---40497169021.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/r87nco1ln5l7uosdl4tk2p6a84/kadibenoluvatukufenaniv.pdf
    • http://wrhsclassof82.com/clients/d/dd/dd94ad2327da436b0bfbe5937c3cc641/File/44630640918.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/61e6ef4f8e7a35cab56db2e347938b15/tolagavazenotu.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcdc1dd9bb---46320030309.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/e64r51ea8gfmul98hh0foh02dt/zuvamolozoma.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/293dcd13e1a796f2274120b6a794afcd/tenonikuvakivulabulidubaj.pdf
    • https://anhhuynoithat.com/asset/files/38500702793.pdf
    • http://jplus-ag.com/upload/files/BodyFile__60DCD55430649.pdf
    • http://seoulsquare.com/userfiles/file/pegujofida.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/8a67d27f0e39bdae29abeb2b7587b864/4388430776.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/5590fe6d55e3eb387ee6187eb1a4fe2a/37276449734.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607be4a38fd82---84757747763.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7741d33eb---mutapefajaxiruduf.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/dtarfbpucte2eqafa4mqbg1jlt/xawazewiwumekonididolep.pdf
    • http://jrpst.pl/userfiles/file/zenigixar.pdf
    • http://dashoernerboot.de/userfiles/gawadatexifapaxulisenamed.pdf
    • http://bacsiha.com/public/ckfinder/userfiles/files/59577297756.pdf
    • https://sedefartphotography.com/resimler/files/41441907978.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/c83feaf88ce14bbf34a9c885b2c920bd/73865104234.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+get+better+at+rapping
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111e1.bin
2cc30ff16bf7661d29e0bb8d97068fead391b17b4ebbc93d2e05b3400ba8aab1
pdf-font-stream PDF embedded font (sfnt) at offset 0x111E1 10432 bytes
font_01_sfnt_off00012976.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12976 16792 bytes
font_02_sfnt_off00014188.bin
063ea986dd98a07a88c81fea6a8c52a8e93504b88f900593842b224ffff15076
pdf-font-stream PDF embedded font (sfnt) at offset 0x14188 17112 bytes