Malicious PDF — malware analysis report

Static analysis result for SHA-256 39bcbdeafbc494ed…

MALICIOUS

PDF

73.2 KB Created: 2021-01-24 18:34:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e3efdf054d50537372caba4610d5a5bf SHA-1: 67578a5e307f482524ccc7e48aad61e5509c8da8 SHA-256: 39bcbdeafbc494edef2154c8900349018e4de783ff501f983150010610007850
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/123?utm_term=maya+angelou+poems+phenomenal+woman+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4503525/normal_5ffb822a91bb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384150/normal_5fc93f2b1a102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488806/normal_5fdc40e8d0b85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527164/normal_5ffe487a2db93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_600a743b4cd58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368964/normal_5fcfe7c73e26b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479705/normal_5fc69c6f5cb36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418972/normal_5fceed2e36e4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_600c26731fc65.pdfIn PDF document text
    • http://espaceabone.com/gavudeburaraxarozexufuvap4umfr.pdfIn PDF document text
    • http://apsdd54gfv.xyz/98257386264ixgly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403406/normal_5fd92d29688fc.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/tadevewuju/zinaxiwizovamugegef.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/pepuwojibokawijimugorexoj.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/ffxiv_leveling_guide_30-_40.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_off0000e0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E1 5556 bytes
SHA-256: 78dcaf58fa77a1120bf88d739038fc2eb00b365901ef67290f7a36b4f1455775
font_01_sfnt_off0000f3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 10504 bytes
SHA-256: 28d4654a7948c35c5e0c65881db6b6dd65870f4167a6927e390e321a30f3d7d4