Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b561627cabd778…

MALICIOUS

PDF

153.3 KB Created: 2021-01-22 11:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 464575d2b43bdde966a61b052a619d2d SHA-1: 83af2338d98d1ac923656bbd196ef56b714f01ac SHA-256: b1b561627cabd778aaf74729a243cdff994b423cfc1fe520405beeccf3775c00
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely to redirect users to malicious sites. The embedded URL 'https://seumenha.ru/123?utm_term=bonnie+and+clyde+death+pictures' is a primary indicator of the redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/123?utm_term=bonnie+and+clyde+death+pictures PDF link annotation
    • https://cdn.sqhk.co/vatepasoxi/jif0jgh/broken_dawn_2_hd_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/wojeberupe/djeg2gc/gejewolu.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotonolo/mfiia0d/pojotiz.pdfIn PDF document text
    • https://cdn.sqhk.co/tojebaru/hc2w1sh/95977080520.pdfIn PDF document text
    • http://tupakewufitid.iblogger.org/73328136796.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/roghpkd/orange_tree_resort_scottsdale_az_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/fSgfhhF/36242321429.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501775/normal_5ff4ae8739ca4.pdfIn PDF document text
    • http://gomijojupi.iblogger.org/41204651020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383302/normal_5fc5b80bcbbd0.pdfIn PDF document text
    • https://cdn.sqhk.co/firijanab/shfjfdp/endless_run_lost_oz_hack.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tumuzu/jofekegewowujimuwuwoxeme.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/breakup_party_manayenge_video.pdfIn PDF document text
    • http://gowegonuma.epizy.com/81092634415.pdfIn PDF document text
    • http://wavubodalut.epizy.com/17046633406.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/segukazuvorumikejasa.pdfIn PDF document text
    • http://ligumawi.epizy.com/65456181681.pdfIn PDF document text
    • http://walefusariwe.epizy.com/mitijodujab.pdfIn PDF document text
    • http://dobifagamuwu.rf.gd/rorebuwiwibuk.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/mcdougal_geometry_textbook_answers.pdfIn PDF document text
    • http://tepuvat.epizy.com/lm339_smd_datasheet.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_off00021b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B4A 5312 bytes
SHA-256: 3bf6d2658746115edb2fa317370a753b34d2ec61d2576d3d1469134776a6424b
font_01_sfnt_off00022d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22D59 12832 bytes
SHA-256: 2d87306d219c969f25e7799b4ba51eee29068d06f998e5e31c9c9c6c150a3003

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