Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab541a6fcfb4862…

MALICIOUS

PDF

96.2 KB Created: 2021-03-19 20:08:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 657599eb53f34294766f62e42cd53f61 SHA-1: 1899ae4e86eeb132e625f71ea4c97e8575d171b2 SHA-256: dab541a6fcfb48628717ff22c90377458dd5c4a57ad78d558df5cb4d10764a1c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/wix?keyword=pro+baseball+bat+dimensions PDF link annotation
    • https://cdn.sqhk.co/gizukakom/dSNZjh1/20421391996.pdfIn PDF document text
    • https://fatilisuwojumo.weebly.com/uploads/1/3/4/6/134652656/nowopowik-surinuraxafi-tuzixiterimik.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/9112257.pdfIn PDF document text
    • https://cdn.sqhk.co/genonitag/jU8DgcJ/31587487550.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/hjjdjgX/civ_vi_app_review.pdfIn PDF document text
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/burepu.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/gerund_exercises_for_high_school.pdfIn PDF document text
    • https://jepexilopenokaf.weebly.com/uploads/1/3/2/6/132680937/8578718.pdfIn PDF document text
    • https://lokapane.weebly.com/uploads/1/3/4/4/134464640/sizeduvakupika_ponifavurako.pdfIn PDF document text
    • https://wodorolijuzawex.weebly.com/uploads/1/3/4/7/134770742/xopofosigavom.pdfIn PDF document text
    • https://divamokavagi.weebly.com/uploads/1/3/4/8/134871471/mijog.pdfIn PDF document text
    • https://wobikuneli.weebly.com/uploads/1/3/2/7/132741052/9368823.pdfIn PDF document text
    • https://cdn.sqhk.co/pilozarager/igqiiLw/swot_analysis_personal_development_plan_essay.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/59605028584.pdfIn PDF document text
    • https://dolumipekino.weebly.com/uploads/1/3/4/6/134625527/sorekimetan.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/LSjcYjH/auditor_general_report_barbados_2016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_015d51d12ffc47a98908511e400a4379.pdf?index=trueIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_9deffc28908c4fce8192e996a15308fa.pdf?index=trueIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_88ad90133d894ea693484c40f4c74a38.pdf?index=trueIn PDF document text
    • http://sugamane.onlinewebshop.net/73780207241.pdfIn PDF document text
    • http://nifusotajezunur.atwebpages.com/57638278524.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_b5cd50eb3d0a4425abf60ca01d9933c8.pdf?index=trueIn PDF document text
    • http://zodofujeki.atwebpages.com/fabisusudujimugupovaga.pdfIn PDF document text
    • https://c22e5cf4-338a-4003-9cad-c1cb0be29285.filesusr.com/ugd/3db607_df9e03fdf2834363913785a307c2af80.pdf?index=trueIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_7a66e7952ee6437ba01fb319a8d3f55a.pdf?index=trueIn PDF document text
    • https://9f349447-249b-4747-956a-316fe86e371b.filesusr.com/ugd/d2b720_0ce65fc99cc54006a1a29082739ed162.pdf?index=trueIn 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://scripts.sil.org/OFLIn 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_off000124af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AF 5112 bytes
SHA-256: 9211f98ac58cc78051581ea0938fc5ac9b0b69000f0b23726019d268e39ff186
font_01_sfnt_off000135f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F0 12000 bytes
SHA-256: 8b9b74222249eb7bd7aadf3cd6d2699cc4b543ce7ba8acab6f5f0a0b3e9e3ca1
font_02_sfnt_off00015e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E36 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d