Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c6daf3bcd495631…

MALICIOUS

PDF

72.7 KB Created: 2020-11-24 09:10:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d0ab2aa0bdb72f5ff8cf495493beed0d SHA-1: 1cdc8464f1eaec741760310ba186c5727cbdeb1d SHA-256: 1c6daf3bcd495631ff028c755639e68c86605ea37d10d7e3720bd89e0ec8679d
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. The embedded URL 'https://ggtraff.ru/aws?utm_term=goodyear+assurance+all+season+consumer+reports' is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier and ClamAV detection strongly support its malicious classification.

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
  • 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://ggtraff.ru/aws?utm_term=goodyear+assurance+all+season+consumer+reports In 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/2d2f16bd-6ded-4bc1-bb59-6298a3cc77dd/83309407325.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/mafilobizepore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633c528c-46c6-404e-a0b6-9c30bc376428/watch_so_much_alternative.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86415069-ff71-4574-9d96-5c642e15eb9c/organic_chemistry_vollhardt_7th.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/54408924302.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/badinerie_flute_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00b09b6-6040-4754-b1ef-c679ef7cb687/41009593167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08de5abb-978a-4a3a-8d0c-7ea4979800a6/windows_prime_video_app_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d78ab1a-23a5-4051-abc0-bb337abd6d51/10994916381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fdbeaef-4b49-4774-8c05-c390e05fe398/65049567581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c47e863-c362-489c-b104-a4c0cd6cf001/ketagibanomab.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/gevudigema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d4a380-0738-4ad6-a584-109191fa7856/balisujar.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/gugagajuxujazedisus.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_off0000cb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6D 5192 bytes
SHA-256: 4726997d186b9b4d35d4c8046ecedb755d7562196cc5c376d722e2e83f59ff83
font_01_sfnt_off0000dd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD49 5352 bytes
SHA-256: d728c428e38ddd5649451e41751a587ddc03476992261d26749b823fc9535ea4
font_02_sfnt_off0000ef70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF70 11124 bytes
SHA-256: 79734eaa1db5d584d37a26081b6427e4f842460accd6b2a65cfcd3d5411bf6e3

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