Malicious PDF — malware analysis report

Static analysis result for SHA-256 484c2f17458d33ee…

MALICIOUS

PDF

75.6 KB Created: 2020-12-27 22:15:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6c20f913ffa73a6f167f1f413191fcf1 SHA-1: e5a0c3c283cb5ea0c82e07b14b79feea5233222e SHA-256: 484c2f17458d33ee1d5708d6085b7ee912081c6cab4c6e77be7443e928b3f2f4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged as malicious by ML classifiers and ClamAV. It embeds external URIs, including one pointing to 'traffnew.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to 'stock market crash game online' and application metadata, which are likely used as lures.

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 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.
  • 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://traffnew.ru/123?utm_term=stock+market+crash+game+online PDF link annotation
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/lokoxuduxafasi-gapevo-muxokaselemi.pdfIn PDF document text
    • https://zexajupa.weebly.com/uploads/1/3/4/6/134692079/jibisorijuwiku.pdfIn PDF document text
    • https://badasemo.weebly.com/uploads/1/3/4/4/134482086/zojazuvaxelugekadalu.pdfIn PDF document text
    • https://cdn.sqhk.co/sawowudin/ijeaaih/99678655550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_5fd7d64b23bdd.pdfIn PDF document text
    • https://nozigofomin.weebly.com/uploads/1/3/4/4/134481739/gukepabeso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fadobirak/banner_design_software_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/chess_notation_apps_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/autocad_2015_portable_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/angularjs_filter_date_format_example.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/atrial_fibrillation_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/fiction_reading_comprehension_worksheets_8th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/metformin_weight_loss_success_stories.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_off0000e8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C2 5380 bytes
SHA-256: eddd378ab947ed15e74e91ebe5d28b5060fd302b2eb4460c3c2b0991f649ad74
font_01_sfnt_off0000fae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE3 11368 bytes
SHA-256: 30501f480f0ba26e8a0ab50bccbadd5b1704f3448ce3b535d818acad7bd5d511

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