Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aea4d090f1d18aa…

MALICIOUS

PDF

68.6 KB Created: 2021-01-11 14:09:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 5ce4ad838c955badfb10caee9f25d45a SHA-1: b18b7ca3f0586141c2eb214d2bbe825b3198c8ff SHA-256: 2aea4d090f1d18aad3955226da510680508da6debfce1a165881cc119d66a530
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing or malicious document, including a large number of external links and a high ML classifier score. The embedded URL 'https://trafffe.ru/wb?keyword=notepad%20free%20download%20for%20windows%20xp' suggests a lure related to software downloads. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to exploit kits or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/wb?keyword=notepad%20free%20download%20for%20windows%20xp PDF link annotation
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/6876863.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528876/normal_5fc894dc1dcf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_5fabba0431481.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legenapi/hypogonadotropic_hypogonadism_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/sekibifefibibetugizu.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/74750314448.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/advantages_of_globalisation.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/different_forms_of_energy_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/pafapawomovorivamimasopi.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/nimonexitimeg.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/1584821266.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_off0000d033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD033 5164 bytes
SHA-256: dc305f02a7cff713694a2b7de741d08393826b0b01b30ab889f837a65523232b
font_01_sfnt_off0000e1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F1 10572 bytes
SHA-256: a254dd62023e38edd448967e10d63e8cc4be9f342f4102421221d6c7701ab3bd

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