Malicious PDF — malware analysis report

Static analysis result for SHA-256 6111e663f0c0fdae…

MALICIOUS

PDF

77.1 KB Created: 2021-02-26 09:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b411c851019e4a2735e80b12b6e75278 SHA-1: cc20eb64fdfa8a8d90f87754054345a1a1b55814 SHA-256: 6111e663f0c0fdaed6ae6c43803d496b864ec52347e186a4b7d3807576069ce0
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://yafferge.ru/wb?keyword=woodcock%20johnson%20iv%20tests%20of%20achievement%20examiner's%20manual'. This indicates the document is designed to redirect users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://yafferge.ru/wb?keyword=woodcock%20johnson%20iv%20tests%20of%20achievement%20examiner In PDF document text
    • https://cdn.sqhk.co/figakeves/4jehe4n/2482836483.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/sheGuhi/71128505303.pdfIn PDF document text
    • http://gipawavanitexe.22web.org/ronutopanezimozewuvomili.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/bersa_magazine_thunder_380_plus_matte_15rd_capacity_-_thun380pm15mag.pdfIn PDF document text
    • https://cdn.sqhk.co/juzosugun/sihibgd/fogomiwutiligidurip.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/lanorolowu/anamnesis_catholic_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/zudekubedokux.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/42627680026.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/71176951233.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/exemplo_de_relatorio_word.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79D 3144 bytes
SHA-256: 42527c88654c6de7571aa204bb90023990eddf7bed4257d4f432a64aec6c3d36
font_01_sfnt_off0000e2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CC 5456 bytes
SHA-256: f36c78323374bf0415871d88c7ac82ea12785b494b75c2ff3423adf3031563d0
font_02_sfnt_off0000f544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF544 10376 bytes
SHA-256: c54b23b1039497fceb9229a556908589aea48ee37541c1da357629379c7ee52c
font_03_sfnt_off000118a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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