Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c14387e8383336…

MALICIOUS

PDF

70.0 KB Created: 2020-12-16 03:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a86ff0295f08bcaf3b761ee48b95ec99 SHA-1: 124075ac282eebbde90d78b79f39dc71766d334f SHA-256: 57c14387e8383336d14cd7529b7c2ce9625643386606a09f4f4f9039a22a6be6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=how+to+clean+my+acrylic+bathtub'. This indicates the document's primary purpose is to lure users to a potentially harmful external site. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/strik?utm_term=how+to+clean+my+acrylic+bathtub In PDF document text
    • https://giligigava.weebly.com/uploads/1/3/4/4/134494785/3546934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503578/normal_5fbc630d2999d.pdfIn PDF document text
    • https://wabemogulumog.weebly.com/uploads/1/3/4/3/134384503/foletode_sutosej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f8e0837a87cd.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://static1.squarespace.com/static/5fc1210ec89e1c4b8fbfc3b6/t/5fc84b23b0f45b2a3d20a997/1606961957148/bowmasters_game_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4deb088c99b6d37c0af76/t/5fcb7ed26fd93023bc05efcb/1607171794443/stickman_battle_fight_superhero_stick_fighting_game.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5705145a8629dca8066c/1606375173901/64142154179.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b5119849b27a00a8296b/t/5fd5f4460f11661d4c20a642/1607857243070/82778498193.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28d7517e7202640f4b4d6/t/5fc767274f9413233b21023a/1606903591823/81293413650.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10620bf71053ccb10dd13/t/5fd101d68e6bd722cdc52aa8/1607533015160/suppository_for_babies.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/lisuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/tovak.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_off0000c8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CE 5040 bytes
SHA-256: 85582283f01746fb92b285eec3475369366e81ebdbde98ba3dc117f6c2e3a8bd
font_01_sfnt_off0000d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 10236 bytes
SHA-256: 5b797563dafd02fe43f4fe0eb8403f14dacad3b411ee97a3bd5fa055f7f1a9ca
font_02_sfnt_off0000fce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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