Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0a62ea5fb823da…

MALICIOUS

PDF

90.6 KB Created: 2021-09-17 12:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2f1b7750b08e3a5dcbaef8feaf117df8 SHA-1: 694b4188034deb295a4c5db888f874cdb5ab2f24 SHA-256: 2c0a62ea5fb823da9ff98ee8f6de10b4c1cca5f236d31894f3a289d4600644d3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of external URIs and link farm indicators strongly suggests an attempt to lure victims to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://inwebjor.ru/uplcv?utm_term=golf+multiplayer+android PDF link annotation
    • http://aylincinarli.com/fckfiles/file/76286043748.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/vemopakifoviva.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/6276447601.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/jobalomanijapijota.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/71863542449.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/liwuvukawalinowojudatige.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/1e940ogn3qr85drll1oo6io0od/29706929995.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614256f863d85---gilupotopepapedegi.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/dedc75fdd18a550b084bea32c0bfa069/68639328906.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/kuwebukuzagujebaz.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb0df5b104---megefevaxokunot.pdfIn PDF document text
    • http://hnht-electromagnet.com/d/files/37498584366.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/62026706605.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/94637370405.pdfIn PDF document text
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/gewezevidakulotoruxeduxom.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613180fbd92a3---dewowes.pdfIn PDF document text
    • http://luatsugiadinhviet.com/upload/ck/files/vonafijegazuvitas.pdfIn PDF document text
    • http://sp2wronki.pl/fotki/fotki/file/56442519240.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/gavularinuxava.pdfIn PDF document text
    • https://ltes2.tw-goods.com/UserFiles/files/41061554468.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/kabagusokutoresenutuvig.pdfIn PDF document text
    • https://atavio.ru/files/file/70117412801.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/2e3b42e71e7e7ce1980326423409486b/31228266727.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/kubotivipuminatodapofet.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_off0000f496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF496 10744 bytes
SHA-256: 284318e731705750eba913e92a677ad055940731b30bc61784955486016bc7d6
font_01_sfnt_off00010d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D46 21332 bytes
SHA-256: e2ebfe0704c2bc14f7dd695cc0e4711e326a42fdf0b8d300d6176e96c6e14dd1
font_02_sfnt_off000144b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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