Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82f75a5a5f44120…

MALICIOUS

PDF

65.7 KB Created: 2021-03-02 15:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3340c8226e3cfac9fa3ccda1e0bc3273 SHA-1: 91de878ff50647be69b2642afa3df5602fbd4c09 SHA-256: e82f75a5a5f44120ef7689525c1b2598582f2649ce7320a90cec0138fec8a467
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 0.9998

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://baarspo.ru/123?utm_term=organigrama+de+la+secretaria+de+desarrollo+economico+del+estado+de+mexico PDF link annotation
    • http://artelamp.store/tony_robbins_awaken_the_giant_withinpadgs.pdfIn PDF document text
    • http://dezlice.ru/tiles_for_kitchen_walls_price9a4rq.pdfIn PDF document text
    • http://sunshop.pro/videos_tiktok_teluguyujcr.pdfIn PDF document text
    • http://carbackseat.site/38550010450mrtbt.pdfIn PDF document text
    • http://italy50wow.pro/gusejosirqeaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fe7926cbe9de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413368/normal_5fdc7b05f1901.pdfIn PDF document text
    • http://storeeu.info/495789277162jxhp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480579/normal_60316dab7249c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488574/normal_602a374a02ab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_60394b87d2039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_6030796ea163d.pdfIn PDF document text
    • http://rodsfish.club/monthly_billing_statement_template_excel0mai6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zufakugofozufi.epizy.com/ancient_greek_coin_crossword_answer.pdfIn PDF document text
    • http://bupelasupur.epizy.com/how_to_become_a_solution_focused_therapist.pdfIn PDF document text
    • http://medesawawolujim.epizy.com/53591600151.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_off0000c095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC095 5352 bytes
SHA-256: ff8a47eda0c759c9cfbcb96925375365d4def27858fb2dd88ec480042a286491
font_01_sfnt_off0000d2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B8 11420 bytes
SHA-256: ad941aee6ca7d2113b9208541cee4326f3d65456915e16c01bc2caa14eb2dbf4