Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb51a6bf9da64087…

MALICIOUS

PDF

77.7 KB Created: 2021-03-02 07:23:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 44be1446052583d89848274ad43551a0 SHA-1: 798e075f6a3dba6a2c00a27d5e40aeff517ece4b SHA-256: bb51a6bf9da6408712b601697ad12654b4cd2fb5cb95c21aff91fbd4a75b5b89
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to disposable domains, suggesting a link farm used for phishing or malware distribution. The heuristics indicate the document attempts to lure the user into executing commands via the clipboard and presents a password-protected archive lure, common tactics for bypassing security controls. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest an attempt to download and execute a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://baarspo.ru/strik?utm_term=tenvis+camera+reset+password PDF link annotation
    • http://inertbhjbj.ru/pathfinder_adventure_path_hellknight_hillorujf.pdfIn PDF document text
    • https://famofupogatom.weebly.com/uploads/1/3/0/7/130739443/5705068.pdfIn PDF document text
    • http://mavpa.fun/epson_wf_7510_cartridgestfp3.pdfIn PDF document text
    • http://pugalibapuf.iblogger.org/52787101175.pdfIn PDF document text
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/jalaveburolijis.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/4247366907.pdfIn PDF document text
    • https://xugilatopuke.weebly.com/uploads/1/3/4/7/134746985/lodam.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/apc_offline_ups_br1000g-in.pdfIn PDF document text
    • http://topsol.xyz/has_starbucks_changed_their_cup_sizesrnd94.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/necchi_sewing_machine_threading_diagram.pdfIn PDF document text
    • https://mipigonegomef.weebly.com/uploads/1/3/0/8/130813466/8965770.pdfIn PDF document text
    • https://putifunefam.weebly.com/uploads/1/3/0/7/130775131/nafapadadirek.pdfIn PDF document text
    • https://muduzefob.weebly.com/uploads/1/3/4/0/134018051/luxukamutolojesasage.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/minn_kota_ulterra_trolling_motor_recall.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/pozapenalumezorunuze.pdfIn PDF document text
    • http://topsale.pro/5673743418rkul2.pdfIn PDF document text
    • https://wutupebepa.weebly.com/uploads/1/3/3/9/133997315/155f06d85c32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vejegaba.atwebpages.com/linulizozobubotes.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/why_isnt_my_aux_working_in_my_car.pdfIn PDF document text
    • http://puwagof.rf.gd/merokolazufiz.pdfIn PDF document text
    • http://vuwamim.rf.gd/gutegejinesokika.pdfIn PDF document text
    • http://sewoxoxitif.rf.gd/back_to_school_rules.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_off0000f339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 5288 bytes
SHA-256: e165ac8a01036425769470e26cc574072a36061335b0475c0e791ce1ccac754b
font_01_sfnt_off00010534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10534 10504 bytes
SHA-256: 6250739df234894b6794cc9b8a00d389bb4a5da644c0bfe89308e8cdf5c4f3dd

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