Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8e474661d37b0d…

MALICIOUS

PDF

77.1 KB Created: 2020-11-29 23:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 85e88e760cfc9e33c5a47aed092889b1 SHA-1: d41d4e942ea2c335e78de2b17649bf52c935271e SHA-256: fb8e474661d37b0d5ac0547ecef2384f94c3fe52412016bf7c7a8a921e454164
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/strik?utm_term=great+choice+dog+crate+replacement+door PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387235/normal_5fbdcae7aee38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_5fac0b113df0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5fa34d391885e.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/fekazudabo/melusirenogofipefe.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/free_stickers_for_line_app.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/ny_fly_ins.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/dna_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f275c851-b133-4834-a0b4-4809d184b7de/39547649669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b4a28fe-4d44-4c0c-bf69-3fa9f64ebd32/58384485037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93348610-30a3-4cdc-922c-93e2add6d7c1/demetrios_bridal_gowns_at_macys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935dabc7-8612-423d-a8b7-2b9a7e5bf2a1/fepoguweg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4287ec8f-0f51-432e-a8e1-2a9472ca022d/beowulf_study_guide_questions_lines_1-319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa037ca-4015-419e-ad53-340ce7e87d69/nupumefebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b82266-15da-4d6d-8b96-d9f0c89b9942/johnstown_pa_library.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_off0000e3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 5128 bytes
SHA-256: faebf3dcc4acdf8529e3347ad614fc10e0cd67ba5cab172eb906895a77428aed
font_01_sfnt_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 10444 bytes
SHA-256: 21bdf2d1ef7085405e55eeff4838daed59c26c6565ecba493a00280730afd2d0
font_02_sfnt_off000118de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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