Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7f8a19035491ba…

MALICIOUS

PDF

69.1 KB Created: 2020-12-26 22:32:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6a4b6c41ee5414874d95c897a634da62 SHA-1: 2a0840c4fb5eb844d2bcbd21707ca568a7a96f18 SHA-256: ac7f8a19035491bab9df13b4c854b7ff5c452e72aad360fea9ea7e6b93110850
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by a ClamAV signature (Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0) and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'traffine.ru' and a heuristic for a 'download button' lure suggests the document is designed to trick users into clicking a link to download a payload. No scripts were extracted, but the overall structure and detection points to a phishing or malware distribution attempt.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/aws?utm_term=broncolor+siros+800+l+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5fd990b9b432b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367281/normal_5fc4aa914b64c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5f8d2e532028b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492536/normal_5fcff5094c46a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456705/normal_5fc4e9049fc3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_5f9b7f686b5cf.pdfIn PDF document text
    • https://cdn.sqhk.co/letowajaf/jcGggf3/25459236481.pdfIn PDF document text
    • https://cdn.sqhk.co/zotevokep/charNhi/spaceflight_simulator_1._5_apk_mod.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/070ba3ff-497d-4863-84db-3b8b0026a2b1/9030300814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71e8a77-28a2-41b8-8a5e-92eb17e0ef39/motekenamonebijiwune.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_off0000d0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E3 5332 bytes
SHA-256: e2da66eb1332e450e8e0db519cf0082ab8f33534167ad50da8df022f829a5e90
font_01_sfnt_off0000e2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E5 10920 bytes
SHA-256: b7f0fbf03f7eb540c06a490f48f88d52408bfbc5392c3011061e74611fdeaea1