Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5e32556a1d3184…

MALICIOUS

PDF

89.3 KB Created: 2020-11-22 15:10:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 978a45095155d004b51c229f4888e37e SHA-1: 587dea7d3340a9e6773f06ba1d315a5411f0c05a SHA-256: ee5e32556a1d318413049f4b8f5e3301ab3984172f6695a24e03925eace53c71
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with one pointing to 'trafftec.ru', suggesting a phishing or SEO link farm tactic. Although no scripts were explicitly extracted, the PDF structure and the presence of external links indicate an attempt to redirect the user to a potentially harmful website, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/123?utm_term=taguchi+optimization+method+ppt
    • https://pirowefe.weebly.com/uploads/1/3/4/4/134444143/a558b.pdf
    • https://cdn-cms.f-static.net/uploads/4469645/normal_5fae5c574a47d.pdf
    • https://cdn-cms.f-static.net/uploads/4387702/normal_5f91bb56a5aa2.pdf
    • https://xigodawi.weebly.com/uploads/1/3/4/4/134464905/gumafatozenajudopu.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lonozote/lincoln_elementary_school_new_britain_ct.pdf
    • https://s3.amazonaws.com/tetazino/libosevututoloxoti.pdf
    • https://uploads.strikinglycdn.com/files/cbfdab56-5798-4461-86e0-b34ab3180aa4/mudonitexoxezazageruwazu.pdf
    • https://s3.amazonaws.com/tevigotu/android_google_photos_slideshow.pdf
    • https://uploads.strikinglycdn.com/files/50afd3d2-ebbb-43e2-9263-7f133677212f/75550519209.pdf
    • https://s3.amazonaws.com/nuxomigo/vemepixisogum.pdf
    • https://s3.amazonaws.com/wisatutadi/dragon_magazine_critical_hit_chart.pdf
    • https://uploads.strikinglycdn.com/files/441e77fc-8ed9-4666-b536-980dd8882ff8/27713685116.pdf
    • https://s3.amazonaws.com/susopuzupure/nigexuvunisel.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb73.bin
866bc2cbf9a8b373bb814ed5a9918f9b481ddd80e9bd7c81ba5e7eb15f81387a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 1956 bytes
font_01_sfnt_off00010464.bin
120031fe3bec56396978c7ee96c7272200ae67fa38112c3539ebe93ad3a3c421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10464 5180 bytes
font_02_sfnt_off000115e8.bin
1ea4860bc88257baff5d1930ac9d8a051b4b98771fba32c12466e3c981d4083b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115E8 2128 bytes
font_03_sfnt_off00011f20.bin
68e4cdec2bd48fd996a79c80ad101510efcd8852008dd1995a8078cefa390fc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F20 18156 bytes

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