Malicious PDF — malware analysis report

Static analysis result for SHA-256 060183a777064654…

MALICIOUS

PDF

80.9 KB Created: 2021-06-08 13:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c07b4f188982e836d732776b9f9969c1 SHA-1: cb284e2ad8b59e34a8e4434da4e5ed1e03e6a102 SHA-256: 060183a77706465449a17c7d543b4dc95c2130b9472484b4807b636666316f57
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 0.9991

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://garglob.ru/pbw?utm_term=whatsapp+plus+apk+8.1+download+blue PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454681/normal_5fdd722d9aaeb.pdfIn PDF document text
    • https://jajozopikikaju.weebly.com/uploads/1/3/4/3/134359408/4034092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_602526cc5dc4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413113/normal_5fd884a1217c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485454/normal_6041bf955ef82.pdfIn PDF document text
    • https://dimazemoredexi.weebly.com/uploads/1/3/5/3/135309177/0f35608902ff6.pdfIn PDF document text
    • https://jatilesaza.weebly.com/uploads/1/3/4/3/134316516/980b52ec120.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tevidaxen.pbworks.com/w/file/fetch/144664440/legion_2010_full_movie_english.pdfIn PDF document text
    • http://karulimomaw.pbworks.com/w/file/fetch/144850545/mirubalogamapozixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b0ec49b-b654-4e6a-9ece-ec5b1cbc8677/nc_drivers_licence_sign_test.pdfIn PDF document text
    • http://natutaliva.pbworks.com/f/kenmore_water_softener_troubleshooting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4da2735-7002-48ec-8c26-a145b00e71ec/emergency_med_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ae0fa8-2b43-4ffa-a179-3f82afc8ac49/dugixuvokarelebonuwutari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50dcbb9e-4d86-46e7-9546-1f0b2d88110b/27315824107.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/f/95843971635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722a7499-b949-4816-a6ef-a7db52b4c330/xadopelapebowexunupuna.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144418941/why_does_it_smell_like_maple_syrup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2328b888-61f7-4ec3-8ce1-7300b6ba927c/pivobunonojusugawixuxovo.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/8452973521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/153bc9af-8dde-4ac4-8b67-e7ab41c19dee/best_town_hall_10_war_base_2019_link.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cedff66c-f44d-49f9-a5db-239605cbcc7d/what_is_the_simplified_form_of_120_100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b811d5f-4509-47ae-9a7c-77d4930d5cc7/what_is_the_central_idea_of_persepolis.pdfIn PDF document text
    • http://zezimin.pbworks.com/w/file/fetch/144593124/how_to_get_birth_certificate_in_india_for_green_card.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AF 5540 bytes
SHA-256: 9e6f2fcaa3f8ee915548e2d68d56ab01d7ac051e42a2362e2ff47353f529ef2c
font_01_sfnt_off00010793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10793 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off00011023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11023 10896 bytes
SHA-256: 4729e431546975e54b077b2faed6672d5d481bd54a5a0a2709f184b5925993ff