Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96a80f5d6ad0031…

MALICIOUS

PDF

76.8 KB Created: 2021-02-26 04:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0257a961dfeaed38db486fa2c213f2f8 SHA-1: 6a01b8a063f3f5d170d8169d2823dc896477d7d7 SHA-256: d96a80f5d6ad0031d3f7dbdebca48d3175f90d829bb3d9265e102aa1b9d7b7a6
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains and configured as a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely serving as a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=ls+island+pirate PDF link annotation
    • http://frontglass.xyz/fulexavosibopujhl2mu.pdfIn PDF document text
    • https://tawusizigegik.weebly.com/uploads/1/3/3/9/133997505/8863321.pdfIn PDF document text
    • https://netajetuz.weebly.com/uploads/1/3/4/6/134651380/kumufifotureru-fipufa-mijika.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459058/normal_5ff23a9e5d892.pdfIn PDF document text
    • http://fitokapss.xyz/brain_food_lisa_mosconijkgmg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_5fd78b6895f05.pdfIn PDF document text
    • http://custits.space/aquasonic_black_series_user_manualfzeer.pdfIn PDF document text
    • https://bufetokarad.weebly.com/uploads/1/3/4/0/134096279/20235c64beec265.pdfIn PDF document text
    • http://helper-badges.com/63229925279kgrks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443292/normal_60366f745d076.pdfIn PDF document text
    • http://instapodarok.site/one_moment_in_time_piano_sheetc597b.pdfIn PDF document text
    • http://lifeit.pro/que_significa_la_aparicion_de_moretones_en_el_cuerpouctb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369771/normal_60095e9d7fb64.pdfIn PDF document text
    • http://sberbank.services/cold_war_2018_soundtrackclh5x.pdfIn PDF document text
    • http://didezidise.22web.org/bukhansan_national_park_trail_map.pdfIn PDF document text
    • https://bukenazupe.weebly.com/uploads/1/3/4/5/134584610/xenof.pdfIn PDF document text
    • http://tinurll.com/160ckbIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sapakebozo.rf.gd/biterivaxojib.pdfIn PDF document text
    • http://begulazelukej.rf.gd/4349446714.pdfIn PDF document text
    • http://pexevogawi.epizy.com/sec_accession_number_format.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_off0000f07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 4896 bytes
SHA-256: f18e22edf10fd28708359990fa2438c096ebd3730d37d5e2fefdd286474e7ce8
font_01_sfnt_off0001012f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012F 10872 bytes
SHA-256: a67beed4790d4a18067f5948fd28d1c3fa684c8816d1190f47aacea3bebd1309

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