Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea990d47c3c1bdf…

MALICIOUS

PDF

80.6 KB Created: 2021-02-26 23:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 52e2391bbde146cb8d2533d2b4c23141 SHA-1: a71526500ecfda0a969ba52a37ae6d6e49c5a2d6 SHA-256: dea990d47c3c1bdf49745c1035827ee34936c606534753a38891c80c59bb5407
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body and embedded URLs suggest a lure for a game hack, directing users to external sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/wix?keyword=dragon+city+apk+hack+9.8.4 PDF link annotation
    • http://fuvesozufinefi.medianewsonline.com/fufaxufawevinolejedukapab.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/bebuvagazizidugegu.pdfIn PDF document text
    • https://cdn.sqhk.co/netesatova/RQiWFtt/best_photo_transfer_app_for_ipad.pdfIn PDF document text
    • http://nakavadibukukep.22web.org/bpsc_ae_admit_card_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/GD2hhgh/3d_crystal_puzzle_skull_instructions_30932.pdfIn PDF document text
    • https://cdn.sqhk.co/mizogujuzo/Y70jhgg/dugaxuripopubomo.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/difference_between_impressionism_and_expressionism_in_art.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/cqnTKmS/photo_lyrical_ly_video_status_maker._ly_video.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://jemileti.atwebpages.com/jikoromof.pdfIn PDF document text
    • http://lagarudu.epizy.com/jagulawoduvi.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/3d_exporter_for_navisworks.pdfIn PDF document text
    • http://xesewopalokix.epizy.com/21747188679.pdfIn PDF document text
    • http://xiwaresijo.epizy.com/wordscapes_answers_daily_puzzle_november_1_2019.pdfIn PDF document text
    • http://duzuxaxuba.epizy.com/what_is_the_main_theme_of_emersons_essay_self-reliance.pdfIn PDF document text
    • http://vusevupitiwo.rf.gd/social_psychology_topics.pdfIn PDF document text
    • http://jaxegug.rf.gd/31935930829.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/vafigelirivukonet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 5288 bytes
SHA-256: d1c18871d8ca29527ef9b599c364dc454013b6c365ef331ba7bc27c9a4bc8c6e
font_01_sfnt_off0000fe6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6D 15092 bytes
SHA-256: 5fa985b24b6a5e42f30a5fa3590805d88b0120db6b32c0af40dc985380758efa
font_02_sfnt_off00012778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12778 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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