Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9b02630a87976fa…

MALICIOUS

PDF

91.9 KB Created: 2021-05-27 07:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 91cc46ce7998978e22d7345008e19174 SHA-1: f1838d486079f0178a4a3e46be6a980f646a9bd3 SHA-256: f9b02630a87976fab3941352a993c6af241dca88b880238b3c0769a3c7725518
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 0.9990

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://botokaw.ru/strik?utm_term=doom+and+destiny+advanced+walkthrough+chapter+4 PDF link annotation
    • https://rizozupobaze.weebly.com/uploads/1/3/4/3/134331191/2110117.pdfIn PDF document text
    • https://gojolukok.weebly.com/uploads/1/3/4/4/134455450/jesixopesuxel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370097/normal_5fca6a0de1bee.pdfIn PDF document text
    • https://mawoluji.weebly.com/uploads/1/3/4/2/134265904/456591534f.pdfIn PDF document text
    • https://gupekuvexo.weebly.com/uploads/1/3/4/6/134610658/b52a8a50d.pdfIn PDF document text
    • https://febasenijig.weebly.com/uploads/1/3/1/3/131379808/4377102.pdfIn PDF document text
    • https://widufosonetorif.weebly.com/uploads/1/3/4/5/134598319/kimode_ravup.pdfIn PDF document text
    • https://repadugudemi.weebly.com/uploads/1/3/0/9/130969496/gutox.pdfIn PDF document text
    • https://kizegugiruliti.weebly.com/uploads/1/3/4/7/134729255/tebuw_katiwifidofalem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466662/normal_60570b09a0ecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_602598e855e27.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/wumufebejelasite.pdfIn PDF document text
    • https://rovonowevon.weebly.com/uploads/1/3/6/0/136051941/gipurojononozaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_6052ff7501a5a.pdfIn PDF document text
    • https://bazamafew.weebly.com/uploads/1/3/4/0/134016738/ab61e.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/a9bb4ac1-df5d-475e-b432-bacd163076ea/intuitive_probability_and_random_processes_using_matlab_solution_manual_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2404cdd5-a7dc-48ee-8596-c355bd89f3fe/tubovasabekawotibupos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd5c9d8-73c6-4939-9a36-eb6137f1805c/29230825016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e515a5c-d0ff-4490-a43b-5d794edaaeec/list_of_quantum_physics_symbols.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f12269ff-3686-403f-b2fd-7e3d4f052f7a/stihl_ts420_concrete_saw_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a82acf-4854-4cd8-8503-36266d8e252f/chronological_bible_reading_plan_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f086e1c-fd14-480e-8985-14997985500f/kiwotupereraxedikofeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0ecdac-49a5-43c0-907d-d07d2adccae4/creative_sound_blaster_x-fi_surround_5.1_pro_driver.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_off00011c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5E 5892 bytes
SHA-256: e3dfa4d03ce68f4aef8a58435b217162df8add58a0fc304ba242a1c7c8cf9621
font_01_sfnt_off0001306a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306A 2236 bytes
SHA-256: a5cb4918489952136b44c1aa6dd11d6d1859577cf30f416ccad1b66782247f89
font_02_sfnt_off00013a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A84 10936 bytes
SHA-256: 6daf0b7201dee291303c939e5e033362f3be21183102b8d4431287e40957179e