Malicious PDF — malware analysis report

Static analysis result for SHA-256 37f8da3b835df495…

MALICIOUS

PDF

64.2 KB Created: 2020-11-23 08:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ef2ba0881f8c2520258053a4aa478ef3 SHA-1: 9b19db544c70f0776533a9cc7e434196463f0a03 SHA-256: 37f8da3b835df495b01c5048482c9a8fa4122b685c42fd2ade09775e1ee8e7c0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one pointing to 'traffset.ru', suggesting a redirection or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=scary+ghost+face+templates PDF link annotation
    • https://mosuzikovadapa.weebly.com/uploads/1/3/4/6/134667275/6945746.pdfIn PDF document text
    • https://ritibamubube.weebly.com/uploads/1/3/1/4/131437410/8045672.pdfIn PDF document text
    • https://wulenewovifof.weebly.com/uploads/1/3/4/5/134588468/a44cad11ceb79.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://s3.amazonaws.com/sukedil/desazu.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/vujupiwavisazamedegos.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/baby_shoe_size_guide_cm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49063ed-dc2c-4dda-a51d-9f95dfa0c851/fipetalifizoxizuxowapuvug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39718a3c-10a2-4d90-ae0f-4a245ec9236a/sindhi_lada_mp3_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/drug_muggers.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/11519133352.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/buscopan_bula_gotas.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/nuxekofinitoremu.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/15974119444.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_off0000b363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB363 5268 bytes
SHA-256: b6c23e10f0b8742fea15526141c044f69792998265ae6914dc4c502ce297e4c1
font_01_sfnt_off0000c550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC550 9708 bytes
SHA-256: 41822c8ae0dfb3fb6cf3a2e58050b24c699c1433735cccc75f0d1f26e379394d
font_02_sfnt_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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