Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb79cc4debba6005…

MALICIOUS

PDF

76.7 KB Created: 2021-03-10 22:58:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4bb9bad85c0f4a1774ab869d4cbd50db SHA-1: 2542156ae4c298bfdd0b0e1bac2f537038642382 SHA-256: eb79cc4debba6005a13c31b2c485df4711cf68b0b64ff1c01f7a4f2ae072fbed
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and Weebly hosting, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/award?keyword=car+insurance+policy+sample+pdf PDF link annotation
    • https://kodanefonilulev.weebly.com/uploads/1/3/4/7/134702772/4794011.pdfIn PDF document text
    • https://pijaxulejogelub.weebly.com/uploads/1/3/0/8/130874219/xinererigipajav-fatipev-kigudaruxap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416331/normal_602e54ad921e8.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/wood_stove_shop_near_me4ta24.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/mini_bike_repair_shop_near_me.pdfIn PDF document text
    • http://uscarins.info/vibulerimitobafuuf4xn.pdfIn PDF document text
    • https://matisosu.weebly.com/uploads/1/3/2/6/132681513/4210075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_5fe80c6a105a9.pdfIn PDF document text
    • https://zefisazivite.weebly.com/uploads/1/3/5/3/135314851/2271104.pdfIn PDF document text
    • https://topifovav.weebly.com/uploads/1/3/4/5/134595147/687c60f6ae3.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/onn_tv_codes_for_charter_remote.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421199/normal_5fee71c147f36.pdfIn PDF document text
    • https://tagopebarezixog.weebly.com/uploads/1/3/1/6/131607889/1935390.pdfIn PDF document text
    • http://you-bestshop.xyz/horus_heresy_collected_visionsgijoq.pdfIn PDF document text
    • http://ladunosim.sportsontheweb.net/elite_fitness_inversion_table_it9310.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/gomiwesebegezijudewum.pdfIn PDF document text
    • http://50offit.pro/honeysuckle_rose_lead_sheet_ebsn7ky.pdfIn PDF document text
    • http://vesajob.getenjoyment.net/23238205357.pdfIn PDF document text
    • https://wijununag.weebly.com/uploads/1/3/1/4/131438003/pogasajulibukexofole.pdfIn PDF document text
    • https://mokadipubozot.weebly.com/uploads/1/3/2/3/132303064/gebefit_mutofipix_puzipipax_jefuwi.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/74766727332.pdfIn PDF document text
    • http://marketitaly.info/xidopedepakawexibakzjq7i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bejanifezilo.atwebpages.com/mmpi-2_test_free_online.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_off0000eff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF6 5308 bytes
SHA-256: ba593efe5a5664f5a652d2b5eff3b79ee841b73420ff030aca19c130779ae276
font_01_sfnt_off000101f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F8 10412 bytes
SHA-256: 49e13a3e935c1956d05696ed85e492cee1a1ddb7b8e004188ad7c195616443b2