Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b00366c73d7503…

MALICIOUS

PDF

87.4 KB Created: 2021-03-05 12:11:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f39df0dcb2c5551affeb9e447ab61b3d SHA-1: abce40018117612e7792f1e99cacfbd9f58dfa39 SHA-256: 15b00366c73d750363832e2d3bb6b8e75b6d92d46b8bafba6b1cc2cde55f0fd9
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or SEO-based malicious content delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://soxebez.ru/award?keyword=how+long+does+water+softener+take+to+regenerate PDF link annotation
    • https://retarabad.weebly.com/uploads/1/3/3/9/133997928/sonigo_rojalosebarapab_getudukejewik_moren.pdfIn PDF document text
    • https://barurusijibipek.weebly.com/uploads/1/3/0/7/130740419/9071193.pdfIn PDF document text
    • https://tojuxumisadef.weebly.com/uploads/1/3/4/7/134714483/baduvaja_zujimi.pdfIn PDF document text
    • http://gaxixumerimu.iblogger.org/61639075114.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/aSTgdH8/governor_of_poker_2_premium_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/IQginAC/zenubinasebejok.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/jiSH4je/mega_anime_avatar_creator_games_do.pdfIn PDF document text
    • https://cdn.sqhk.co/fufejapopunu/AgcFhjd/63465275687.pdfIn PDF document text
    • https://biravozoso.weebly.com/uploads/1/3/4/4/134400929/0a4e7.pdfIn PDF document text
    • https://majuxakitififez.weebly.com/uploads/1/3/0/7/130738909/4149202.pdfIn PDF document text
    • https://vepibasizux.weebly.com/uploads/1/3/1/3/131380915/8774536.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/gjbgxjd/t_mobile_near_me_opening_hours.pdfIn PDF document text
    • http://xaloripefe.22web.org/94778007276.pdfIn PDF document text
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/d5e34e89019e25.pdfIn PDF document text
    • https://cdn.sqhk.co/kobedobofepo/fgiiceu/cairo_club_orlando.pdfIn PDF document text
    • https://cdn.sqhk.co/mimufedu/eCwhefH/fekijonujisom.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/iaifjc9/celebrity_cruise_ships_newest.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7382ca46-7c02-4d01-9124-7cb6ed7e0f50/what_is_new_sociology_of_education_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13851cf3-721a-437c-b7cd-c241449eafe8/xebumerizut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522b58b3-69d1-403a-b9e3-b40a2c9d9bed/47081335936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2dee028-eb98-44b1-95e0-e4f28d873032/zemiragozajagiwovezosul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82cb1f3a-e7a4-4c9c-b95a-534cce0f5a00/wall_street_journal_sales_letter.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_off00010db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB5 4932 bytes
SHA-256: 1a72d40e636cc1faf0f3a88fa897b2615c2f7811cccec0621b8ef9fd971158fb
font_01_sfnt_off00011e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9E 10308 bytes
SHA-256: d8b7395cba461cfe3725bfd968afcae36952dd70966c2bdc824580f2d3b721a7
font_02_sfnt_off000141e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e