Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3e8229e28a2aa4…

MALICIOUS

PDF

69.2 KB Created: 2020-11-14 16:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5709827d051fd81277a53fd0bce0336 SHA-1: bda781478453cf8e0448b46255ea4c52d5fed827 SHA-256: ee3e8229e28a2aa4b0a19ce8f5807074a8f80e2050514053a72335ad48b0b0c7
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it's part of a link farm designed to drive traffic to external URLs. One of the primary external URLs identified is `https://trafficel.ru/123?utm_term=square+dance+music+for+callers`. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-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://trafficel.ru/123?utm_term=square+dance+music+for+callers
    • https://vosaxoro.weebly.com/uploads/1/3/4/4/134469305/515481.pdf
    • https://tidosivapozagul.weebly.com/uploads/1/3/4/3/134390518/gekob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jamokaroxoj/how_to_use_japanese_abacus.pdf
    • https://uploads.strikinglycdn.com/files/6403acc0-3e2d-4e73-886c-f75f948c9bb2/line_of_symmetry_worksheets_for_grade_1.pdf
    • https://s3.amazonaws.com/tobovunoberiki/formacion_enlace_peptidico_traduccion.pdf
    • https://s3.amazonaws.com/dazinibonofobi/retifiwumiruroxa.pdf
    • https://uploads.strikinglycdn.com/files/2e88b88e-3203-4876-94a5-80adaab7c1d8/an_offer_from_the_blades.pdf
    • https://s3.amazonaws.com/kokesatodixon/the_magic_of_thinking_big.pdf
    • https://s3.amazonaws.com/zepifudoxapo/84991803072.pdf
    • https://s3.amazonaws.com/wegemebufojafak/18132150930.pdf
    • https://s3.amazonaws.com/woberiz/earth_science_june_2019_regents_answers.pdf
    • https://uploads.strikinglycdn.com/files/7b4cb8fe-2819-4bfe-a5a1-55df3ad40132/system_analysis_and_design_quiz.pdf
    • https://uploads.strikinglycdn.com/files/028cb61f-c26d-41d8-9da7-aef85ab38e11/keto_lean_bh.pdf
    • https://uploads.strikinglycdn.com/files/77114b13-21c1-448e-9b60-bc12ec5f824d/xafoxevisixamevamud.pdf
    • https://s3.amazonaws.com/kevava/representation_letter_sample.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_off0000d02c.bin
c35bc68d9f67b140c4ec179d6ff63726d357d2336c3eca3c96d23ad558e776ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xD02C 5396 bytes
font_01_sfnt_off0000e270.bin
d9103517bce2aadc5d02af544b41a4ad40eae8eb9884a37d419af51060fa1600
pdf-font-stream PDF embedded font (sfnt) at offset 0xE270 11088 bytes