Malicious PDF — malware analysis report

Static analysis result for SHA-256 edae2268bbf09e2d…

MALICIOUS

PDF

70.0 KB Created: 2020-12-04 17:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cdff912d4ab62a6a343e74ed6a4e2a9c SHA-1: 96cd356926c4882149b2c0d26e7fa2cb86470b96 SHA-256: edae2268bbf09e2d8673b84fb753de1cd6902332a0c86ecd7891583812382738
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm heuristic, indicating it is designed to host numerous external links. One such link, 'https://trafffi.ru/aws?utm_term=chemistry+practical+questions+and+answers+2019', is embedded within the document and flagged as suspicious. ClamAV and an ML classifier also identified this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure suggest a phishing or malware 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/aws?utm_term=chemistry+practical+questions+and+answers+2019 PDF link annotation
    • https://magojumenuta.weebly.com/uploads/1/3/4/3/134361537/55e6d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404502/normal_5faee2f218855.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/wirewawofud-sirusirazu-divomaveduvirem-pedorifupa.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/abe3f8ef-d4e4-4b35-80b6-c245884f9789/80102399094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d61f46-bf18-4915-ab81-dfa39f3a73d3/creative_bible_teaching_lawrence_ric.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471204c7-f2c4-4b17-aa24-f42070da5790/68185118299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df40f66-4034-4415-a39e-ff306c2c24c3/49166422083.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/1387656850.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e7ad6609fd0ee79153f2/t/5fc1b4589ee0f32b8792b7f3/1606530136329/craftsman_lt1000_pulley_diagram.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e155104edf1d7780ac3e/t/5fc11d08145a8629dcd8a0b6/1606491405696/caveman_nutrition_bars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff84e4b4-ceff-4430-a3ff-889c550465bb/faropizutanekuleso.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_off0000d2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A7 6020 bytes
SHA-256: 1ac02b47d91c989d7ebf0be896b7cac272def30749b4e3ab8adee4f5c1baaedc
font_01_sfnt_off0000e709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE709 10636 bytes
SHA-256: 19f99410678c1a8b8e8d547d0073de4e2d088cc8cfed9b32107f09c3c57d47b7

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