Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e9c8e4fc05cf33…

MALICIOUS

PDF

75.2 KB Created: 2020-12-28 07:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7a614b3c9676cb1cf42019752a55abff SHA-1: 1a3b060e42d000c8a4875afea77379704b05362f SHA-256: 04e9c8e4fc05cf33d74363c6cba1191984882464101fe3321b2408da453a6cd0
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=download+metronome+beats+pro+apk PDF link annotation
    • https://mikudone.weebly.com/uploads/1/3/4/3/134370159/mozof.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/dVieIib/3461671818.pdfIn PDF document text
    • https://febumade.weebly.com/uploads/1/3/4/7/134757335/2401779.pdfIn PDF document text
    • https://nofabirudop.weebly.com/uploads/1/3/4/4/134455392/kaguxavopozawat.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/2jhcpjg/xobodadogepe.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/791ca06ef8.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/d6e5ea3a-2052-464d-8bdb-969757ff183e/suzajozumupixojilexo.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/singer_127_adjusters_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e96f9ea-d123-4eea-ad14-687c1b324e22/force_and_destiny_game_master_s_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66270e11-5e5c-43d7-974f-8606e36844a9/ludezelukakigaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c36e0f-5761-4595-b02e-7714360974d0/kezom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33D 5400 bytes
SHA-256: 85370a3e4131fb6a60b583a25bb727063692aa430c3386903b8a548b1bc78d43
font_01_sfnt_off0000e592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE592 10800 bytes
SHA-256: 40888764184e1324dc10bdca2eb5f0b5206b1bb50abbe0fb9ad85fbb029bd1e1
font_02_sfnt_off00010ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE8 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8

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