Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b994e286e6ad3eb…

MALICIOUS

PDF

126.5 KB Created: 2020-12-18 04:17:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 41fd93a89f599f7fac49b3c6d35e2f39 SHA-1: 15dd58a9c6bfa0dfc219d237b72dc033b5a91018 SHA-256: 8b994e286e6ad3eb51703d1122fd1dcda220079f00232d01631521d691206a34
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'trafffe.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to song lyrics.

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://trafffe.ru/123?utm_term=song+lyrics+when+i+was+seven+years+old PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f90afee5e142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449185/normal_5fbdb92c108e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382613/normal_5fc7b520339e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422147/normal_5fc7fcfe28ffc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484635/normal_5fb2d1dcc7849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449181/normal_5fbbf3c89f95c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456984/normal_5fa4810995d36.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/16f82f57-826b-482a-8528-05d53b2e6970/contingency_approach_to_management_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db801a04-6a83-4139-984a-e231a986656d/daxidiravimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a82589b-1d7f-4b2e-9d80-5fbd7b4dabf1/25198774966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c86538f6-0089-4f92-827a-16288f2f9f20/play_fancy_pants_3_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/000fd320-b57a-4b29-8fc7-9e75c302ad4b/tivewotivigurilisasizuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69511ec-69eb-44cf-816f-f3394f69ba99/85672614627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be5fd8ce-eedd-4251-903d-97c6752af44c/xiruzugiluledenomowediso.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/83681969174.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1E0 5556 bytes
SHA-256: 51580a2d76590567fc9acda1eb7513630b0e14d9f1113c4a8e95c6c9218054d6
font_01_sfnt_off0001c4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4DB 12044 bytes
SHA-256: 3122f6afe1f84eb2f7d5ed1ba980462b98f8ed8ec03c478210f0ddde602c0842

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