Malicious PDF — malware analysis report

Static analysis result for SHA-256 b854c7ac2964022f…

MALICIOUS

PDF

73.6 KB Created: 2021-01-09 18:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 21298b1a9594985a12ec94a1e4dbfdff SHA-1: d594e911b2ab2177375c22a0c7fb36deeea06648 SHA-256: b854c7ac2964022f8c23376f62089dd65e525ae78ba416fe6d0253016c7a7c65
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafffi.ru', which is likely used to redirect the user to a phishing or malware distribution site. The presence of PDF-specific heuristics further supports its malicious nature.

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
  • 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/aws?utm_term=grizzly+bear+cartoon PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4503874/normal_5fc78f12dc0f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420939/normal_5ff05c129a968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5f98aa2de35ff.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/3sbcxJX/kakaf.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/XWjiFgg/last_minute_hotels_santa_barbara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5fb92f1b6846d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402503/normal_5fc801fae59db.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/0b9025d4-6448-4cff-8c8c-cd4fa4621686/56673291632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a629186-9ca2-4d59-9346-4df4f2f0749e/71327482251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d8f49d-3a4b-47e4-9f04-6d9c086a4304/14327640421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563d1858-4069-4bc9-b4bb-1cf021f3db17/jhm_tech_frp_unlock_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/aws_devops_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9624e763-30e6-4e82-9056-d0bda079579a/sue_and_sue_2016_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d509519-5b1a-4c82-b1b3-b066d80b2fae/fusion_reaction_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/18474426089.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_off0000e2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CB 4936 bytes
SHA-256: 789ab7fafbab884cbaeef6efc761b4cfad36c1ee1ff315073aaeb9e2054a0a5f
font_01_sfnt_off0000f3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BA 11612 bytes
SHA-256: 2ad4f3a6854be7126db4a528d0e6609eb20d9bcc6719f65e5177542e6b6539fb

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