Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d9c6532a11c8a5…

MALICIOUS

PDF

74.7 KB Created: 2021-01-09 18:18:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3fce5c1b6d865c1d73376fab86328ff2 SHA-1: 90fb1262f91fc71bd44f933cfb8826a6c36794ba SHA-256: 15d9c6532a11c8a5418558cc46faa16dccc352f37eb68371a6de9efe67ed1525
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://gettraff.ru/123?utm_term=44-40+ammo+cheaper+than+dirt In PDF document text
    • https://cdn.sqhk.co/fofodafexadu/hc28Ons/merge_merge_cat.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/9HiaMFi/military_battle_tanks_for_sale.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/0e991ae7-4283-4368-8ada-3a8be8ec40c7/unlocked_galaxy_s7_xda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f7aafa-a6b8-4f9f-9481-c98bf349dc10/58903827374.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/billions_arousal_template_soundtrack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c1f18e-9820-423a-a3b8-c82e574e2cdf/46873721477.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/17_legal_age_in_new_york.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd49265d-d352-49fb-a6dd-aa1f41b51ad4/duduvopab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f5774b-2dab-4456-91c6-4832f958b8ba/rogejivopobabulebo.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/82930713981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4f4ed24-72c2-43d7-a96f-c05c2d864a8c/wujegedofojizesipe.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/radezipeviwizabobevaxof.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/st_johns_fl_property_taxes.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_off0000e731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE731 5268 bytes
SHA-256: 1a172b7538fdccbbc763568f3c8de3bc2ff00c2f93906f81cc209028b189798b
font_01_sfnt_off0000f8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FA 10780 bytes
SHA-256: 4eb9d62aadac570c3e012512bc2d914ab5cc19f54039da5d2dc29843d82e0a52

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