Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9026fcd3003ff9…

MALICIOUS

PDF

101.8 KB Created: 2021-07-17 23:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d656f872d04f9bc35ace8db93dbbca0c SHA-1: deb6d8a5a500ef045eb35334e3c290cff9c4f783 SHA-256: 5d9026fcd3003ff9e5d14281ebd5579807ebc13de310d09975e67c3c6dcf741f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a phishing lure attempting to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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 http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/gvb27dmtn4mg48v66kpb0o4gc0/77638412890.pdf In PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6ec921300761d4886377c044017fac99/32526219142.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/p2gu6kd4m4geinpu3aof1hlkci/nibaxadujelusirelejo.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce4740a6aaf---levese.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7165855b51---zakugubajozakigup.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/f12c8c6a0d187cfbeb3831591c54d76b/94500480606.pdfIn PDF document text
    • http://effektfilm.de/files/file/dabojimamudeg.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/78711919118.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/70439677725.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/66185477490.pdfIn PDF document text
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/wupabas.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/naxamiruxe.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/demigimibelud.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad977e80060---kogafowuvexut.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/52761192057.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/ed457b01a473d561d796a82692748c50/vutanukamemizizobo.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210706223721.pdfIn PDF document text
    • http://canadanur.com/resimler/files/89921847951.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/76865099078.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/ludasajiwigoliwokur.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/gimipapuwid.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/65514259152.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/kibuzalaxunefife.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=what+do+leopards+eat+in+africaPDF 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_off000127b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCD 10708 bytes
SHA-256: 2732559d728a0f742e7239ef86e330a4467f8d8b118e04dd9592323cc5f8484f
font_02_sfnt_off00015852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15852 19660 bytes
SHA-256: 9cd236bec998893853147e5663fa8bbf5a3990d1c2551c3bc4389182753018f9

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