Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c5149d80c96481…

MALICIOUS

PDF

78.1 KB Created: 2021-03-17 02:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d2121b9b557a0ad4e5088f416fa2da65 SHA-1: a5b3839f1062a5393b8f727d6229263b7dfb2cc5 SHA-256: 56c5149d80c964812218b2a33a7a9e9eff750229a613cfcaaecc3bbd781b89f6
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating it functions as a link farm. Several heuristics, including PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM, confirm this behavior. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these external links. No scripts were extracted, but the structure points to a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/wix?keyword=apne+tv+ek+rishta+sajhedari+ka+episode+6 PDF link annotation
    • http://gopumapi.iblogger.org/certificat_de_vente_cerfa.pdfIn PDF document text
    • http://atlas-copco.su/background_eraser_tool_photoshop_onlinefteem.pdfIn PDF document text
    • https://bibatajikoxego.weebly.com/uploads/1/3/5/3/135315017/zosuzasipupezage.pdfIn PDF document text
    • https://jazawimap.weebly.com/uploads/1/3/5/3/135346256/8964f906e1d7.pdfIn PDF document text
    • https://cdn.sqhk.co/milatepoz/ihNiggi/spider_bites_symptoms_uk.pdfIn PDF document text
    • http://nijovilof.iblogger.org/android_17_tournament_of_power_dokkan.pdfIn PDF document text
    • http://anstel.pro/gojolavibedaradudoksp0bi.pdfIn PDF document text
    • http://igafnd.org/dofitumoxinoxijajurue9qkp.pdfIn PDF document text
    • https://nixujukasal.weebly.com/uploads/1/3/1/6/131636737/342add73150d.pdfIn PDF document text
    • https://cdn.sqhk.co/kobamebexog/d3y4Qhb/balance_sheet_in_accounting_financial_position.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/dGhg5ii/super_bubble_gum_song.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/pVibXjf/transformers_quotes_autobots_roll_out.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/c53Ahf4/fidavuvigoworonovutex.pdfIn PDF document text
    • http://ru-1.casa/bewakoofiyaan_movie_123mkvovbmx.pdfIn PDF document text
    • https://pedasivu.weebly.com/uploads/1/3/5/3/135387907/gunoja-rumikamebopixug-lagugorano.pdfIn PDF document text
    • https://sumulepali.weebly.com/uploads/1/3/4/8/134882140/28d257d7146b.pdfIn PDF document text
    • https://cdn.sqhk.co/xudadidi/xErijgj/35209132167.pdfIn PDF document text
    • https://vidasukesidi.weebly.com/uploads/1/3/4/7/134731400/6033730.pdfIn PDF document text
    • https://cdn.sqhk.co/mujutuzidip/icVbhfu/ffdp_wrong_side_of_heaven_album.pdfIn PDF document text
    • https://xuvitekopa.weebly.com/uploads/1/3/2/7/132712193/b0ecf93ee.pdfIn PDF document text
    • https://cdn.sqhk.co/guzoladip/gD72VE0/99129793179.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/Sid3gcg/mini_zombie_hawgs_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wibukosumasej.rf.gd/rewelewusivupejuxasodoj.pdfIn PDF document text
    • http://nujuxat.epizy.com/40660276306.pdfIn PDF document text
    • http://wunozoviwo.epizy.com/battlefield_1_pc_highly_compressed.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_off0000f71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71F 5360 bytes
SHA-256: 8ac124ff53e24820181589c4b7ed516ac59c35581514489d332a585ece185329
font_01_sfnt_off0001095c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095C 9700 bytes
SHA-256: aa0f5e973838690338500da67205380612fb5560a97dcf0759958994e7b0993d