Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06bc5dde5e7a214…

MALICIOUS

PDF

69.7 KB Created: 2021-01-25 22:10:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fe2c24ad98b542415d1c4e4e0152e8ae SHA-1: fb10de634f9326b0880f133542a658368d31f9d9 SHA-256: d06bc5dde5e7a21450707949a2a04b3c25b34cde77e9221fbe4ad7ae6a7b0451
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the 'link farm' heuristic strongly indicate an attempt to redirect users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://bologen.ru/aws?utm_term=albeniz+granada+guitar+sheet+music PDF link annotation
    • https://kozegefiseram.weebly.com/uploads/1/3/1/3/131379202/wobifebegikozi.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/mamola.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/hahcT8h/fegowap.pdfIn PDF document text
    • http://wide-mean.top/627673855993w1nu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480582/normal_60079adb8bf95.pdfIn PDF document text
    • https://cdn.sqhk.co/wusuzevomo/gdidQkr/boo_a_madea_halloween_3.pdfIn PDF document text
    • http://depupejaxidolip.22web.org/7406124557.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xobiluwova.epizy.com/evaluate_numerical_expressions_with_exponents_worksheet.pdfIn PDF document text
    • http://xadiromawa.epizy.com/blank_boggle_board_template.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_off0000d02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02C 5532 bytes
SHA-256: 634ec53d299a4b2b5649856be527e635e5968298bc1cb50bd1a9f536935058e0
font_01_sfnt_off0000e2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D9 11772 bytes
SHA-256: 38a5b8cf6e153af14a0f935a5e7331170c7a94f17d0bd91c67d8fbfe92939a88

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