Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95cf7885b05199a…

MALICIOUS

PDF

86.5 KB Created: 2020-12-28 02:30:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 79e07bad1d30159c771ee5598ba400ea SHA-1: 01fa6efe6b30754f2964710df7250cb68583ed3c SHA-256: c95cf7885b05199a7826ef16f28721454a20aa8213671045d18f10cce814d02f
136 Risk Score

Malware Insights

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

The PDF document contains a high-severity heuristic firing for a redirector link, indicating a phishing or malware lure. The embedded URL `https://traffnew.ru/123?utm_term=valley+of+mexico+geography` is flagged as suspicious. ClamAV also detected the file as `Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0`, further supporting its malicious nature. The document body is heavily obfuscated and does not provide clear textual content for analysis.

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
  • 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.
  • 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=valley+of+mexico+geography PDF link annotation
    • https://cdn.sqhk.co/bawevabob/iiiIhfR/santa_claus_running_shirt.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzezajolu/FspwhdZ/gojagolanimisoziludi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f87d7db2b4bd.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/H5idTgi/cosmoprof_hours_sunday.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_5f9a026885208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_5fc3810a58bcb.pdfIn PDF document text
    • https://cdn.sqhk.co/pobusafi/TeRO4tf/rumble_on_stock_review.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/lgTmJhh/zevemenujodizepumedital.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457854/normal_5fe49279e8020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f8757d01c7ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_5f9d51a14768f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449397/normal_5fcfb057514bd.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/4ghrnij/siwizos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a741d52-e881-4d41-a742-bc1fe7f497ac/amazon_seller_central_canada_fees.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae11ebbb-82f1-46a1-a752-c4178912198f/95363680240.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_off000113c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C1 5384 bytes
SHA-256: 38dc0237e3e931647307e1ff4ee35f0d87afe0a1db15ff1c395b1d3123f855c1
font_01_sfnt_off00012601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12601 10900 bytes
SHA-256: ef0070766eba48d3c7902635659d25f12fa530114f6837fb68d1d6dc7b8d36c8