Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b739c6327efe03…

MALICIOUS

PDF

70.6 KB Created: 2020-12-19 21:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1fbdd0cfcb1171418d5b5736c5adf882 SHA-1: 0c65b20318fb27fc7d61c04651a03a129c39219d SHA-256: f0b739c6327efe03f795a9cd2d14c2b000c4531b97fe236230fb38219b040e94
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URL pointing to 'traffine.ru', which is likely part of a phishing or malicious content delivery scheme. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=human+body+worksheets+for+kindergarten PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c0a898-4e9d-41b3-bd00-3aed9dc2c2a2/mefixefenorowabivorido.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06ef3116eb00e3c49974f/t/5fc35ad1f81c9a2a0c0d0c9d/1606638292318/93141245329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a702bd-c153-4e99-9a08-e86997e7465b/62369688048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec789246-a5dd-40c4-a0cd-e3193b75c1de/nipeziginakiwub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/776466af-3e0a-4cf3-946e-ade08bd36641/sacred_spirit_-_yeha_noha_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74601c7b-6571-4557-9bd4-dc1d0514fd91/38288246716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1f0399-e015-4948-a7ac-76fd5b66f32f/43714783164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41fb1fa2-11cb-460a-9981-64433f5801a9/32624856145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ee6e6d7-8d07-4256-b7c1-02a46cc4bc7c/gufobivewafijelemawes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be65571-22b1-40f1-a1c6-142e43667844/map_of_china_during_ming_dynasty.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_off0000d4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F2 5648 bytes
SHA-256: da59539d5c723f741d5f48e30c6d95eaf20cc50aae2944ec562a0b2702e611ad
font_01_sfnt_off0000e818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE818 11076 bytes
SHA-256: 0c77108f841018cb89f7bac94d812da793e6887cac2864782f6c3eb02da99835