Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7a0dbb5629bcac…

MALICIOUS

PDF

76.5 KB Created: 2020-11-19 07:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 12b9b5e9d800d63aad95a95e38181565 SHA-1: 10c7f41ea7f4f426aca9bae66b0f60554100b6ab SHA-256: 7a7a0dbb5629bcac914bfaa36f564f833194083a1d93c97f5ffa74ad25cc4249
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a 'PDF_SEO_LINK_FARM' suggesting a mass of outbound links for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically flagged as 'Pdf.Phishing.Trojan'. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or scam campaign designed to redirect users to malicious sites.

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://trafftec.ru/strik?utm_term=mafia+2+playboy+photos PDF link annotation
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/belapigojat.pdfIn PDF document text
    • https://fixasamajiwige.weebly.com/uploads/1/3/4/3/134318971/suxukaxezalexorixaf.pdfIn PDF document text
    • https://fezapatinegu.weebly.com/uploads/1/3/4/2/134266508/bezumikonim.pdfIn PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/xalupesivile.pdfIn PDF document text
    • https://robesiso.weebly.com/uploads/1/3/4/5/134501854/xujuzo-gasijiba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/147a5b95-187c-4ad7-ba0b-d939b897e693/83860123365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/947e0e07-5712-450c-abf1-14e1cbadf3c9/14474226926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d6d049e-64de-4c25-bdeb-1aa88c8f24bd/62660916667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6e629d-933a-46cc-bf3d-1f17957dfd34/94607713350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d53a86-a658-4728-82ef-3b85b059cdcc/jonevafivilokipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee4e002-243b-4671-b137-562cb0da4a36/77162546252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9560ced-b755-4fa3-b25b-e5e887b307b4/pesorobeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867ebae8-5fb0-478f-a5d5-62d43aae33e7/borezabejexogimix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff662ab6-7de6-4ebd-9c32-c741a30d43e5/phantom_thread_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93a84db0-0a1d-4d80-8a9e-53c64b68161a/11018653965.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE354 4836 bytes
SHA-256: 89096e7af0b5bb8deea5ae38059f4146c9cdafa8ce11792acc509f264f65a652
font_01_sfnt_off0000f3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 10264 bytes
SHA-256: e29c8049de21a08222934da6d657b72eee9beb8986f9190ecdbf8fa2075980fc
font_02_sfnt_off000116ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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