Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e38e6a8388e2ac…

MALICIOUS

PDF

73.9 KB Created: 2021-02-17 07:15:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f7ed81f1c2bf0b69bfa9eafeb25a8670 SHA-1: dea27514b34bd564476b79b250092d1185b21134 SHA-256: a1e38e6a8388e2acddb98dded7ceaa2cb0c5595eb1d90f41a2cb37dc1f4319fc
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'bologen.ru', which is likely used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to trick users into visiting malicious sites, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://bologen.ru/strik?utm_term=electrical+lighting+symbols PDF link annotation
    • https://cdn.sqhk.co/tefozakozup/xgcU59G/raid_shadow_legends_advertisement_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/VEjfhfV/the_crossing_guard_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/ejh3ifY/video_story_and_photo_downloader_for_instagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489045/normal_600d49d90f24e.pdfIn PDF document text
    • https://cdn.sqhk.co/puzokopu/ijek0fD/25767123495.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481055/normal_600840e606a59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_5fe671ad1dad4.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/7EFmrHj/73838089837.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/UQfMrTd/vokalizoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486197/normal_601d158810b63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408352/normal_5fc6a9fe0fe79.pdfIn PDF document text
    • http://interbank.link/dungeon_siege_2_side_quest_guidefmrw6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_5fd3b1c523612.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413977/normal_5fe6011f5bd6b.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/vebenok/ligif.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_off0000e511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE511 5412 bytes
SHA-256: d6afbd45a461054f6af2859c2f5c5557969d4a5b508db89f0054999c5653cc8c
font_01_sfnt_off0000f758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF758 10192 bytes
SHA-256: d67e997fd4b23f7f72c0492b8681a14b9f51719772424db7ffe1978b942790b3