Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a884fa329b157e7…

MALICIOUS

PDF

78.7 KB Created: 2021-03-21 10:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 44e25a3ceb7779caeea2bb283afd6810 SHA-1: f7297063e7dd6e986cde006b10b9625c5e9082b3 SHA-256: 9a884fa329b157e73b0afb0a1f340080041303c4ebac45c75695c1e27c317487
126 Risk Score

Malware Insights

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

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 0.9993

Heuristics 5

  • 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 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://fokemale.ru/123?utm_term=anbae+per+anbae+video+song++masstamilan PDF link annotation
    • https://xupukowipor.weebly.com/uploads/1/3/5/3/135304830/salaxapejijusaf.pdfIn PDF document text
    • http://galoomer.online/how_much_is_mazda_remote_startpg381.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/QgjRDd3/14850199817.pdfIn PDF document text
    • http://itanah.space/simejatedebanoviragwc60.pdfIn PDF document text
    • http://ing-cliente.com/medical-surgical_nursing_assessment_and_management_of_clinical_problems_single_volume_10e35vli.pdfIn PDF document text
    • http://walkover.me/932333334047q2yh.pdfIn PDF document text
    • https://dirogine.weebly.com/uploads/1/3/0/7/130775503/vimamamavofuwa-fekefumekusib.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/hihibCW/mutos.pdfIn PDF document text
    • https://cdn.sqhk.co/wagejino/cih0ic2/parks_and_recreation_australia_netflix.pdfIn PDF document text
    • https://jugifipunud.weebly.com/uploads/1/3/1/4/131437595/dd13a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410441/normal_5fd3718494d2e.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/94916422621gjfpu.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/b7aicWE/zonujugexebeborakuze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_60114551b727f.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/gdDjcfb/regowofubewo.pdfIn PDF document text
    • https://vesodadetuvi.weebly.com/uploads/1/3/2/7/132740638/617f56b2fd9b.pdfIn PDF document text
    • https://xixebume.weebly.com/uploads/1/3/0/9/130969831/bokeraz_jalanuvipibuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497075/normal_6013ca431d2e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f17c4b1-7161-4c94-9c58-36dbefc5a4f1/nijalajoluxex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd2b59a-cd72-413f-b0aa-5093bfa3dcbd/kesidili.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_8831ddbe4b4d43748b9c62780427d899.pdf?index=trueIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_c6230b1b80d146a8a83a8a14ec3e949b.pdf?index=trueIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_80be3e772ef2492c9cd539813c4d1a92.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d1e455-321a-43ec-9c03-17d551b81a8b/firurazebupo.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF457 5468 bytes
SHA-256: 31741292d60c1179b5de5f8426cb83beee80187253707cd2286025d52896d91a
font_01_sfnt_off000106d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D9 11348 bytes
SHA-256: be683e0f29f815b4b32e89475bbe0892136f18a09b8d02a7d5d0a86bfafe730c