Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a13397285b8e01…

MALICIOUS

PDF

73.4 KB Created: 2021-01-14 12:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 52f9e587dfff0b6d01fb169a64bd4cb5 SHA-1: a2cbb1d08ceae792c24ef4651be49d84c065172a SHA-256: 88a13397285b8e01229556687df82f4a63b0e5d8b83840bdc8e79269df42c643
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://cctraff.ru/123?utm_term=dr.+joel+david+forsyte'. This indicates the document's primary purpose is to redirect the user to a potentially harmful site. The ML classifier and ClamAV detection further support the malicious nature of the file. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing or malware delivery 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://cctraff.ru/123?utm_term=dr.+joel+david+forsyte In PDF document text
    • https://static.s123-cdn-static.com/uploads/4480878/normal_5feee8cf6cdc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384046/normal_5ff65d2e16483.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5fc582f92d876.pdfIn PDF document text
    • https://site-1177382.mozfiles.com/files/1177382/53619480077.pdfIn PDF document text
    • https://site-1178449.mozfiles.com/files/1178449/halloween_costume_ideas_2020_college_girl.pdfIn PDF document text
    • https://cdn.sqhk.co/fatidizeru/ghCjdGA/video_editor_with_music_app_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408188/normal_5ff278b763c6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f8e7844105cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f97df5a13ec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445541/normal_5f9cc11453746.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leributafa/69355474477.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/pathfinder_roleplaying_game_bestiary.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/gevezoweniduviwukodumo.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_off0000e155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE155 5172 bytes
SHA-256: 0b8a1da6e9c79d9be91f2cdc56563d46714b5735e13986acbcba5f6aac3b4679
font_01_sfnt_off0000f31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31B 11596 bytes
SHA-256: 0e0be33fafcbeb6a410bea31e8b9efe6946670dc283b72dfa5acd0c3a56a692a

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