Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0dad7a38906f58…

MALICIOUS

PDF

70.7 KB Created: 2021-06-09 13:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7ecd641714a46758a34638a6647e0f10 SHA-1: 265a10ae092a6863a51899c3ab956962b082436b SHA-256: bd0dad7a38906f58f6cfece09ecb08bf8507d4547ca3d748feeb12bba5ce571c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://chcial.ru/pbw?utm_term=gta+vice+free+download+for+pc PDF link annotation
    • https://baxolelal.weebly.com/uploads/1/3/4/6/134625426/kijoziv.pdfIn PDF document text
    • https://kabokikofonesa.weebly.com/uploads/1/3/1/6/131637300/birunemajisarem-jekadodazuwoxi-kinanagek-kixan.pdfIn PDF document text
    • https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/1a8b007ff687c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489259/normal_60558a9389a8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417414/normal_5fcaf16f8649e.pdfIn PDF document text
    • https://wemizufatevovig.weebly.com/uploads/1/3/4/8/134896488/2402429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_606a399448d49.pdfIn PDF document text
    • https://waxevinibiwe.weebly.com/uploads/1/3/0/9/130969944/punigadevagadip-mijemewureze-zuput.pdfIn PDF document text
    • https://sizosunobefema.weebly.com/uploads/1/3/1/4/131453016/3395114.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/362874ce-4ab4-4fbb-a4f9-145c785ab361/why_java_is_known_as_platform_independent_language.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/13054853981.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/63110965269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/550a1654-cd20-408d-9e24-da20ed1d6d2e/atkins_physical_chemistry_10th_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93dcab54-27e4-4a3f-9d1a-e481a8deb50e/ranger_class_guide_3.5.pdfIn PDF document text
    • http://luwosotatex.pbworks.com/f/59523271570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd5b3f2-ca5e-46b0-a304-e89dfa434797/susujeruxubixolafitalizur.pdfIn PDF document text
    • http://rupebaxo.pbworks.com/f/how_often_should_a_cricket_bat_be_oiled.pdfIn PDF document text
    • http://juvudibip.pbworks.com/w/file/fetch/144581559/what_products_does_pg_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b86584-a42c-4b2b-9644-d0cf1acd0182/78406885887.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_off0000d79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79B 5152 bytes
SHA-256: c626e8dc4d262930bb919c6853837aebe36aaf97a9e3505b381379df20a4bf8b
font_01_sfnt_off0000e953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE953 10604 bytes
SHA-256: bf3d7301a857f90460fb13ac241279eeb1da21aba4695e54ec0bccb06fc0f26b

Open this report in the interactive analyzer, or submit your own file for analysis.