Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48e347de3961dfb…

MALICIOUS

PDF

65.8 KB Created: 2020-12-24 06:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 471d4a8e32fe34947cbbaa9bcd67bd17 SHA-1: 1dbfa29ae33763048b7008568129197fa22059bf SHA-256: f48e347de3961dfb519e7b8499066cb943e8af325ba56755a2e0fa95db7c56f6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. The primary external URI points to 'traffset.ru', which is likely a malicious domain used for distributing further payloads or phishing content. The presence of multiple unknown reputation URLs reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?utm_term=my+talking+tom+2+apk+hack+version
    • https://woxoxoba.weebly.com/uploads/1/3/4/8/134893248/2a509e67db.pdf
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/f3b87822.pdf
    • https://cdn.sqhk.co/weteroliwo/Djheeiw/truck_racing_driver_truck_simulator_2.pdf
    • https://static.s123-cdn-static.com/uploads/4405946/normal_5fcace35425ef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jagux/toyota_avalon_2012_manual.pdf
    • https://s3.amazonaws.com/rekorewexidiwo/night_chapter_1_summary_cliff_notes.pdf
    • https://s3.amazonaws.com/votubukaxogilix/17877677310.pdf
    • https://s3.amazonaws.com/vutame/cylindrical_capacitor.pdf
    • https://s3.amazonaws.com/fowonaxul/21884509142.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0c4.bin
ac501a27bf50fcbad8ed480da15ea4d3705bc5bb31424078b50ef9216ff7387b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C4 5708 bytes
font_01_sfnt_off0000d433.bin
4d008941e177153c40d592c8dd6d05a4e3ff4ee8d0b537dfeee924a8d8538450		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD433 11656 bytes

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