Malicious PDF — malware analysis report

Static analysis result for SHA-256 d640212949a76da1…

MALICIOUS

PDF

79.6 KB Created: 2020-11-25 08:35:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 904ae5bd9f889c2beb0c8c736bda7ea4 SHA-1: 2bf9186e8dc879367048fc22c708ef444915bbd2 SHA-256: d640212949a76da1747d496488d0de5dd21cec7c725a55314d76c3c1212e8447
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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/strik?utm_term=whisper+yo+kai+nate PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f88b0501a0fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f871dd07536b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471488/normal_5fad6553df835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_5fb6ecdbdcaa3.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/laresisif_kigadebokenub_bajutinerid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380859/normal_5f95fb680fb5c.pdfIn PDF document text
    • https://riximuboderex.weebly.com/uploads/1/3/4/7/134744564/10b5ce03781.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/potofaw/avatharam_songs_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/66785693913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b2f77a-0b8b-4a24-9a68-dd4024e0b7cf/railroad_to_port_tarkov.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/zadonawirabisoreburofuwu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADA 5596 bytes
SHA-256: 317d5015e9f6e63a9e7ed8b4071e4631a27dde9bab0b06d016adafff26202a11
font_01_sfnt_off0000de4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4B 5052 bytes
SHA-256: 2cc4598a0a21b4f7db2bcd205a97f8cc6cde01dafb6f4b15c793c2683205d8e9
font_02_sfnt_off0000ef88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF88 12940 bytes
SHA-256: a08a513132a57b44228e40498c628ca71ae833553f67ea62da0d134de2c68961
font_03_sfnt_off00011911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11911 16588 bytes
SHA-256: d887570fb4723bf4fd4194869a1e8728851265f359617ce4fd2fe44f7d974a3a

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