Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1b94181ec7b276…

MALICIOUS

PDF

77.3 KB Created: 2021-06-11 02:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 65c53e94c93ac1ba581895a1dce4ead5 SHA-1: c0267a63d9bd27988b74d75871f2adc168e4bae7 SHA-256: 0e1b94181ec7b276759150fb401a2437ac26b342b4b2126ace6584c3382f090b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9997

Heuristics 5

  • 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://krisoc.ru/pbw?utm_term=descargar+pelicula+un+monstruo+viene+a+verme PDF link annotation
    • https://mizefubu.weebly.com/uploads/1/3/4/6/134637235/8635461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452835/normal_6032f01277670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482020/normal_60591ac0cdb3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_6014e53f891f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_6060db7b85073.pdfIn PDF document text
    • https://kosigejobawazi.weebly.com/uploads/1/3/4/3/134315380/riboteboligo_fajifed_favolipowido_bunifabikob.pdfIn PDF document text
    • https://boxotajisosuni.weebly.com/uploads/1/3/6/0/136086252/belejejane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_6062b752299f4.pdfIn PDF document text
    • https://rulodewarozuw.weebly.com/uploads/1/3/4/6/134678260/zonovigu-rujavexef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xugatun.pbworks.com/f/monster_truck_destruction_apk.pdfIn PDF document text
    • http://zekodunu.pbworks.com/f/sample_business_plan_in_ethiopia_amharic.pdfIn PDF document text
    • http://gegoxelaw.pbworks.com/f/88199169841.pdfIn PDF document text
    • http://zusemivak.pbworks.com/f/voloco_mod_apk_3.2_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa3ed8b4-d05e-46b1-8867-0018e5bac82c/91038317030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3656c484-0329-474b-8ef4-a46014fd1f25/60002711169.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144526992/43685308553.pdfIn PDF document text
    • http://gosirata.pbworks.com/f/year_5_maths_test_sheets.pdfIn PDF document text
    • http://pajajafilexe.pbworks.com/w/file/fetch/144766665/puxedemu.pdfIn PDF document text
    • http://zupelapowi.pbworks.com/f/fiat_punto_service_manual_free_download.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/w/file/fetch/144423009/how_to_reset_summer_cadet_baby_monitor.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED76 5312 bytes
SHA-256: 7714e8cd5082378488bee653e21785083edee13c55cd2274a8d4ca38b59047ce
font_01_sfnt_off0000ff82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF82 11840 bytes
SHA-256: b91b800e2a8e963f917e08c764a5614869d58460e57a621a90481c834e4299fe

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