Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c267b7f4cf6f7ec…

MALICIOUS

PDF

66.0 KB Created: 2021-01-09 17:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cd7f818e34051fdf1b74ecc58f71818d SHA-1: 4c4cef80837fb70fa6debd40023653a43a819670 SHA-256: 6c267b7f4cf6f7ecdb2cc4ab5b7e4d36f7451b7310fef0d587f12cc3d4c8be22
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/aws?utm_term=basic+english+test+pdf+with+answers In PDF document text
    • https://lekomuge.weebly.com/uploads/1/3/4/7/134773229/2901945.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/3zEbOhb/jisabavewofewukoluxuw.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluniziwav/Xhf2iiq/lab_escape_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420239/normal_5fdd33db717bd.pdfIn PDF document text
    • https://cdn.sqhk.co/fekesolip/q27ifig/drinks_to_lose_belly_fat_faster.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/dexudo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_5fab79224bf66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_5fb496706ff0d.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/57336d85-fd72-44d8-9602-a543674b8d8e/34982264608.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/wuwalilenoreto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7df0087c-d71d-4c56-8f5e-690f7110fb46/totinos_pizza_rolls_directions.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_off0000c4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C1 5556 bytes
SHA-256: 3032fc84b3bc256504b2967573366fc40c4a1edcceedf350947cbe512c2a8b70
font_01_sfnt_off0000d7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B7 10528 bytes
SHA-256: aca7cf9f6a48687524fbb68efb1973898085dbbebc05b6b6a67034d1d17dd3b2