Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f48ae1104bd3cc4…

MALICIOUS

PDF

88.6 KB Created: 2020-11-19 02:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 578d16e029e60ee2c4912baa1837f3c8 SHA-1: 2d262abe633482d5dfd0c5cb5b26c495bd7ef68d SHA-256: 0f48ae1104bd3cc4de54a449a87ab8ad17800bbc30d2a28c524f4d41c8ebff05
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious or SEO-manipulative content, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links, 'https://trafffi.ru/123?utm_term=tools+for+life+coaching', is presented in the document body and is likely the intended destination for the user. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's a phishing or trojan distribution attempt.

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://trafffi.ru/123?utm_term=tools+for+life+coaching PDF link annotation
    • https://gupimarozak.weebly.com/uploads/1/3/4/3/134350981/verexezode.pdfIn PDF document text
    • https://juboxunogaruf.weebly.com/uploads/1/3/4/7/134700559/7e6ca.pdfIn PDF document text
    • https://gotitodurafa.weebly.com/uploads/1/3/4/3/134351762/697956.pdfIn PDF document text
    • https://nepopuzabigeju.weebly.com/uploads/1/3/4/8/134856357/rodorolujek_dalovogi_wugik_vadusemijeloj.pdfIn PDF document text
    • https://visegonikagade.weebly.com/uploads/1/3/4/6/134626066/c7573c768400d6d.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/jewizopukuni/nupagabalutunanesadixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ada664-1af1-487c-95ff-3b0b5a7ad0e5/93877123082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28dd3d4d-b410-4926-bf08-efa0ba8e4e2d/mefenubimopema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36176042-2a5b-401a-8d87-64c3996dabf5/south_park_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/dagemif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b608600d-86bf-4452-a7b2-f97e8846cc52/73426734800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65acc80e-058e-4ffd-8724-88db13fa6e9c/32926108638.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_off00011d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8B 5092 bytes
SHA-256: 71e679cedf766297dc4c1d09a7ae6bc3354a6611be54bd086080d58c9d8331b8
font_01_sfnt_off00012edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDB 11284 bytes
SHA-256: 83f7b870642ecb4af35bba1f859c357659325de041eb68ee0e521d99c6e924a8

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