Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9299be22af492a8…

MALICIOUS

PDF

85.7 KB Created: 2021-01-08 15:38:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3f159a25603dee794f7786354bef45d0 SHA-1: 9144c3ab4afeba13218e93e90cac5c23601643a2 SHA-256: c9299be22af492a8b7a03345921b9209e55c6f946e68a0b96e72bd66a3f14d71
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this, suggesting the document's primary purpose is to drive traffic to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffset.ru/aws?utm_term=biugo+mod+apk+android+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382209/normal_5fb725fb0789b.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/jxidii1/sifalolezogetumoxarus.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/jd4pHhj/craftsman_building_craft_mod_apk.pdfIn PDF document text
    • https://lupunudarowujak.weebly.com/uploads/1/3/4/5/134599946/dirajab-subatuvobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5fa69575db1b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406456/normal_5fda6f7dd1346.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/12079a27-c194-49c6-a124-e3f8cd762c01/pitawivag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94bd438b-16b8-4442-8d96-bd94ecedaefb/signature_by_levi_strauss__co._mens_athletic_hybrid_chino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82363c69-eede-4991-9db4-476a168f0d98/tonka_tow_truck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f800c8-59f7-4a1a-b70d-036c05250db2/48497535926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbe4a45-6181-44ea-8bd5-64d93e422ced/luvapobosebega.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_off0000ea30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA30 5236 bytes
SHA-256: d0649252fdfe3447e6e29fba199e0018ec8be5ca6e5d69f41d56d10f2b3428bc
font_01_sfnt_off0000fbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE6 4788 bytes
SHA-256: 5f2b5d1aed4d7a3f32334245422e4936d95fe1ba9799d1f215d24aa731de5e92
font_02_sfnt_off00010e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E53 11188 bytes
SHA-256: f7e68d53f0da13391788d9a6e4f7b69804a25a1f21995d9f44b4767dd8394506
font_03_sfnt_off00013474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13474 16132 bytes
SHA-256: 6c511cd2548aab1566dad8f54fccf2be4cd056cf5a4d5d56937977fde9165995

Open this report in the interactive analyzer, or submit your own file for analysis.