Malicious PDF — malware analysis report

Static analysis result for SHA-256 0269b208191b2f8e…

MALICIOUS

PDF

92.1 KB Created: 2021-07-02 15:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a9636d73c883e66cf1993818274c4f40 SHA-1: 551755e74e75112e3b166e3f5e6aeee1c5a7a024 SHA-256: 0269b208191b2f8e50cfee39e36e4c2d6d90083ce0aea00e98c53af5895fce87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://infrive.ru/uplcv?utm_term=donate+kids+clothes PDF link annotation
    • https://hogozaty.com/ckfinder/userfiles/files/gozurafuwitekumudikudov.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087193c73e16---fumigiwimadikafavadu.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160710b18d1e29---73342453242.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/75167e35a78aa5960a8ee8ddcb051aad/fenemulewokasiwasamajosok.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/votezameruwoloxubase.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/7ouvfrjm2vahj8n8n6dkc0cq07/sowabagarukidiwuzo.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/67399936224.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/c7120dc67346a85b917a2f92731f4468/58788995293.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/bc2db59d67bbeb5811e6372d73942e41/38586093398.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/ggimeb4tqaqcont3sr7ru4l3ol/42914067258.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5pfdeuqn2fjpqvjcdqd8dgdc30/52603837952.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/37956820154.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/puxadevitibanutimajerulaz.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160719bf93f45e---28096942682.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/alfo13as29hqff5d5jb24k7ch6/17381865968.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/8ti9vjdr2q67nnolru11pl91db/xawiz.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/verulawunemosapadomuwupi.pdfIn PDF document text
    • http://xn--xhq021fvrwdth.com/d/files/lexopazezoruxodugulurez.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/677da440c924cbbe5539476ba9979d11/kesolon.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/361fd8c161aedfd2c837938add165503/61226247063.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c66badc80a---nabojalamunojo.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/namebirunabuduz.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_off00010756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10756 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F68 17132 bytes
SHA-256: a22e97bfece1985b64bf031fc9fa84d22102de383a25a3d45233def724ecc5e8
font_02_sfnt_off00014beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BEB 10460 bytes
SHA-256: 3bb958e484c4f47e110ca13043a002eb4b32713ff0d862ea4ffca8849d2f2bde

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