Malicious PDF — malware analysis report

Static analysis result for SHA-256 46762442771022e3…

MALICIOUS

PDF

86.6 KB Created: 2021-05-18 22:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 53f347962ab92e875e64d3cb06ad5363 SHA-1: 7fcf1213b8a79df1fa258ed6f7fc6a20034e5515 SHA-256: 46762442771022e3fa9cf26146c6251c2a6f8a79f0970b2349986f4cfa88e159
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, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to wiring diagrams, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/strik?utm_term=binize+android+radio+wiring+diagram PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373261/normal_600f4d7c62d26.pdfIn PDF document text
    • http://puvepagawimideg.iblogger.org/natox.pdfIn PDF document text
    • https://dawokopo.weebly.com/uploads/1/3/5/3/135314789/gajutasugaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424400/normal_6055f4079e35a.pdfIn PDF document text
    • https://kesizibewasi.weebly.com/uploads/1/3/0/8/130813921/352d7d5.pdfIn PDF document text
    • https://roriwemako.weebly.com/uploads/1/3/4/5/134599113/xenenaguv.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/fufeditisefesupux.pdfIn PDF document text
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/8251354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501201/normal_6033099c9d1b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380543/normal_603a23768f30f.pdfIn PDF document text
    • https://xonadenot.weebly.com/uploads/1/3/4/6/134685596/tavil_podabeziwegime_zenifubar.pdfIn PDF document text
    • https://kevavabine.weebly.com/uploads/1/3/1/4/131406582/625729.pdfIn PDF document text
    • http://dalidokumum.22web.org/aide_memoire_tuyauterie_industrielle_gratuit.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
    • http://jumametewarad.rf.gd/45556918898.pdfIn PDF document text
    • http://fupaxanido.rf.gd/fevumivogisusiw.pdfIn PDF document text
    • http://wotikuvejuf.rf.gd/how_to_measure_variance_inflation_factor.pdfIn PDF document text
    • http://ravuxigud.epizy.com/sarawak_government_almanac_2020_download.pdfIn PDF document text
    • http://vukevigax.epizy.com/fsc_part_2_chemistry_book.pdfIn PDF document text
    • http://rukinemofe.rf.gd/voot_app_colors_tv_naagin_3.pdfIn PDF document text
    • http://duvaneloxa.epizy.com/bascule_d_cours.pdfIn PDF document text
    • http://pepagipil.epizy.com/sub_zero_refrigerator_ice_maker_manual.pdfIn PDF document text
    • http://puwolivorofe.rf.gd/the_technical_analysis_course_book.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5E 3188 bytes
SHA-256: b7ba8d1142f781d5cd3b5e022170c6f475633736b7f552bc73f8306a8b9f3c41
font_01_sfnt_off000108d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D4 4836 bytes
SHA-256: 5d0b828870f6cf5266dc0b88f1e0cb27e6387a86e9ca0ad7decde384b4e8e8ac
font_02_sfnt_off00011931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11931 10948 bytes
SHA-256: 2311a6c3c5186b1bd0b61a2338db0b2a77962a8bbe526982a3948226e1c54a69
font_03_sfnt_off00013e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E79 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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