Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a75d8611dc5e4a…

MALICIOUS

PDF

79.5 KB Created: 2021-01-05 00:29:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e6ede250651396c8404ff345c46af2a1 SHA-1: 056547d3cff2ac7a94b51828bebfe22afffc126a SHA-256: d6a75d8611dc5e4a07c7d84bf1d6c1fb041bf3a62b3de8b2612c5de83237e3f4
164 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 by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the 'SE_INVOICE_LURE' heuristic indicate an attempt to trick the user into clicking malicious links, likely to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafffi.ru/wb?keyword=bottle%20great%20flip%203d%20apk%20download PDF link annotation
    • https://cdn.sqhk.co/foxinukepo/5kMgijg/vuvulopatinekel.pdfIn PDF document text
    • https://nawajutexi.weebly.com/uploads/1/3/4/1/134108687/zutinekekoregikuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/dhdmVj7/chikki_mod_apk_unlimited_time.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/d9c46ad2-740e-4bd8-b625-2debc129144f/pamelikipef.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/mazoduwig.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/arena_simulation_software_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/yorkie_chihuahua_mix_puppies_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b78ec77-42f2-4f03-9c9a-90869d23b82e/boy_scout_pants_youth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c692e7a3-1f36-46fb-9e36-381fa1d5e5db/43796797256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de043360-cf6f-4189-8344-9c429cf9c947/84901459195.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AE 5400 bytes
SHA-256: ba2c517c4559b45c2cf2163aa629df850f4f536b24890ff04a61c58732217032
font_01_sfnt_off0000e933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE933 2680 bytes
SHA-256: 8c8e7266d501632797b60a90e6c767411671295d6d58da5a5daf5e1fffc47f22
font_02_sfnt_off0000f431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF431 11108 bytes
SHA-256: 5810d82503728601414767291ea854fdd268cd79b01db6b50e33173cc8ca69c7
font_03_sfnt_off00011a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A40 16516 bytes
SHA-256: cf5df272b9ddb17eccef819591f7a95abf333c8fd328a1d05f26ca005341aa51

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