Malicious PDF — malware analysis report

Static analysis result for SHA-256 9900ef2991165d15…

MALICIOUS

PDF

77.6 KB Created: 2020-11-18 21:47:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d2cdbfaf747659b80168ffe2de4c0179 SHA-1: 923b996497bdd4612680be50f474cdbcbbf5f6dd SHA-256: 9900ef2991165d155bbeb7703c5403e248ab08ab08bbfff4ff7449c658d338de
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'traffine.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to educational content, specifically 'Lesson 4. 6 practice b geometry'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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://traffine.ru/strik?utm_term=lesson+4.+6+practice+b+geometry PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390330/normal_5f8fa9c0e4db9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393180/normal_5f948ff58286d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f886b515c18a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5f90ed7942631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426676/normal_5fb2add407940.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://s3.amazonaws.com/ratixifo/aura_kingdom_class_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50890ac-f8e9-4d88-8899-926c7d34aa52/zarijalivadixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba9f9475-da6f-4beb-a40a-16f1445ca274/korixapapurutij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95530359-2ac5-4561-b8cb-760b495bd810/lowunofenetowerepe.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/think_like_a_freak.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/dictionnaire_acadmie_franaise_5eme_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d4ebfe6-c069-4fc2-90ab-d3adece0e6d5/tadimoravavupemune.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/timeline_resume_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/liwivi.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/highland_park_track_and_field.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/wood_hand_chair.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21D 2888 bytes
SHA-256: daa464992833498aeea8162072d590ce607b5a38febd641a4b4e7fef94ab354e
font_01_sfnt_off0000cc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC67 5468 bytes
SHA-256: 0f08a63d843c16b62288dce936dc9e12932ab5b27709ba3ac9db055c9112a6bc
font_02_sfnt_off0000def4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF4 11320 bytes
SHA-256: cdf8abad13884081d119b7adea9044e1e10d7460b6bc225983ce183300720bac
font_03_sfnt_off00010599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10599 16072 bytes
SHA-256: 062f8a7185608a18dbd56baf48eb14c791e3c6ea8866a2ddd6a03467109098f1
font_04_sfnt_off00011a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A38 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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