Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0f1c02b8c5c162…

MALICIOUS

PDF

82.6 KB Created: 2021-02-20 18:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1d9413eb3f18f1aae1e4ff9c46fb2956 SHA-1: 28ac93e0815bec0047a572d3a5d3ca0ec0cab75f SHA-256: 0d0f1c02b8c5c1628827173fba9d31ebc43df99468073a31ec4c405e38053b36
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed for distributing malicious content or phishing pages. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=what+food+to+avoid+for+mucus PDF link annotation
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/3331995.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/mhdggjh/woxobogodazopekabupavizum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385848/normal_6009a1547d7b9.pdfIn PDF document text
    • https://gexuguxibam.weebly.com/uploads/1/3/2/6/132696321/ruxixifan_rafukeluxe.pdfIn PDF document text
    • https://pojalurerisufi.weebly.com/uploads/1/3/4/1/134109142/378f0a6cca5112.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/fHOihid/police_crime_simulator_superhero_gangster_killer.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/GjbHDTd/archery_bottle_shoot_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/hh8lIgi/puppets_real_name_fnaf.pdfIn PDF document text
    • https://lebetazukuz.weebly.com/uploads/1/3/1/6/131606644/35c9872603098.pdfIn PDF document text
    • https://pibusabet.weebly.com/uploads/1/3/4/6/134695111/4740269.pdfIn PDF document text
    • https://fekakekofum.weebly.com/uploads/1/3/4/6/134656499/7138805.pdfIn PDF document text
    • https://palisuxil.weebly.com/uploads/1/3/1/0/131071308/jiwazataja.pdfIn PDF document text
    • https://cdn.sqhk.co/gijimexuv/ghEtxNr/12358772903.pdfIn PDF document text
    • https://cdn.sqhk.co/ledivure/hijjfgd/78170406046.pdfIn PDF document text
    • https://zoxelokot.weebly.com/uploads/1/3/0/9/130969402/3997987.pdfIn PDF document text
    • https://cdn.sqhk.co/denepepunuja/Xb8NFND/how_to_sharpen_lawnmower_blades_with_angle_grinder.pdfIn PDF document text
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/deriweluwarexe.pdfIn PDF document text
    • https://cdn.sqhk.co/tekonunise/s96nih2/delete_background_apps_iphone_11.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://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_off0000fa84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA84 4960 bytes
SHA-256: aedf4b208633e09e6c709e490a67156a038e595b9bb431aa64b5e3999009923e
font_01_sfnt_off00010b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B71 10384 bytes
SHA-256: 16a04afacaa93997e0db6d32f4287485b5689793cab7dc053dd130db6792a93a
font_02_sfnt_off00012eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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