Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ac0350bf7e89af…

MALICIOUS

PDF

81.6 KB Created: 2021-03-03 22:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b1f619ddcaf4f4445915d9fe0349dbb1 SHA-1: 5a2cb4e61662c8a74887ee8ef62a09edef37f51f SHA-256: a2ac0350bf7e89af4be9a2a83ce220bd58844f66afce27e2d486d41af696e9ad
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/aws?utm_term=alchemy+translation+in+urdu PDF link annotation
    • https://cdn.sqhk.co/bunigenozav/dnjOggb/automatic_music_disc_player_minecraft_java.pdfIn PDF document text
    • https://cdn.sqhk.co/fusifanux/H8Nidhg/winter_sports_3_the_great_tournament_wii_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/pidvYQh/lipimexur.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/8jgujg9/free_movies_and_tv_shows_app_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414166/normal_602207988b591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393791/normal_6034ea3c7d8d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461497/normal_601d2cbd1ff9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469106/normal_5fffce886ec6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_600fdfd826468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493545/normal_602efeb86928c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485801/normal_6026ffd935904.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/harghij/best_battle_arena_game_ios.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/wujixus/39089189639.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/29477312462.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011457.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11457 20732 bytes
SHA-256: 8653c6a8b012a8dce9a1e4f674823b32e893916c35c3da4ea97bcd5ee1f9f46b
font_00_sfnt_off0000de37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE37 5268 bytes
SHA-256: a1e566faf4e9f71b9fee8b7bde2ce4afe4ca6423e1056b0c7992ea04e0bfd9a0
font_01_sfnt_off0000eff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF6 10688 bytes
SHA-256: 8388f4cbb43f12508a5b268699d3e4e646a8b077176369cae70728c8b126a511

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