Malicious PDF — malware analysis report

Static analysis result for SHA-256 767a237a9e17bd9d…

MALICIOUS

PDF

82.3 KB Created: 2020-11-22 03:25:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 98cadc1ff097c3ec595efeb02f6d9a11 SHA-1: 1d589c908ad8329c2d1b527ae57e88078d63565a SHA-256: 767a237a9e17bd9df982ee6d7ba12091ec4587a66f3f33fad0683f502a07d9a9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious or spam-related domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/123?utm_term=shaman+king+anna+feet PDF link annotation
    • https://zafojepomekosax.weebly.com/uploads/1/3/4/3/134352399/2dcf2528687f9.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/7929630.pdfIn PDF document text
    • https://jigaxokere.weebly.com/uploads/1/3/4/6/134622899/9033586.pdfIn PDF document text
    • https://tenigirexono.weebly.com/uploads/1/3/4/6/134645883/330c7b.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/789df6b9-3c00-4bcf-95ee-c959d4e57a6c/katopiligadaxidivupubuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/21200350109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a82430-2b4d-4f1f-b844-a6ab48905af4/37403467668.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/43441636963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6873633-a90f-4ec1-9fd2-61ab009db0b1/budget_spreadsheet_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/47347213342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b27fbb6-800f-4fd7-bb7c-7b1fbfd60c90/hbo_now_tv_code_activation_fire_stick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c2dcacd-04c8-4504-89d6-bb5307b26b17/89167496448.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_off0000efad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAD 6724 bytes
SHA-256: eeccc0be7cd637aec1ce56af42cd7ee132405fbcec2902174143414031cfd535
font_01_sfnt_off000106c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C9 5044 bytes
SHA-256: 25c33b2a2a2905302f2b999fd2b69a51f05646224b67d2cb31c72ef24e8e83bd
font_02_sfnt_off000117d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D7 10780 bytes
SHA-256: 1c23ca95ab1e88a6bc0b2235ae596d45b6f98c3631afe3939cb3ac4d956595f6

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