Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09e4f86f21f5d4d…

MALICIOUS

PDF

71.7 KB Created: 2021-02-15 14:02:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ad0ba6a2a5558e806a78898caf687408 SHA-1: 59cabf1e31e4e49a64d9e9c6484c2532c0298963 SHA-256: c09e4f86f21f5d4dfc7894a6a22d7f0fd771d9d41ee709e076c3b6592486d14d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary external URI points to 'https://maypoin.ru/strik?utm_term=como+orar+por+guerra+espiritual', which is likely part of a phishing or spam campaign. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', further indicating malicious intent. The document body is heavily obfuscated and unreadable, but the presence of numerous links suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/strik?utm_term=como+orar+por+guerra+espiritual PDF link annotation
    • https://cdn.sqhk.co/judixixelof/djbdoN7/porigevepogoduvaxugewowon.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/mkXhjPe/7883241586.pdfIn PDF document text
    • http://kamini33.ru/battle_of_the_bulge_game_guidezt2hw.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/runefusotatowasimuke.pdfIn PDF document text
    • https://neweruruxoponi.weebly.com/uploads/1/3/1/4/131453136/8333d9.pdfIn PDF document text
    • https://cdn.sqhk.co/kamufegoke/igy7rhg/birthday_cake_ideas_for_baby_s_1st.pdfIn PDF document text
    • https://cdn.sqhk.co/mapibeze/qjhMgE0/42859780591.pdfIn PDF document text
    • https://cdn.sqhk.co/noradinez/ijeBje3/alone_sad_girl_images_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/ibhdfhg/36159840240.pdfIn PDF document text
    • http://summ-ita.space/lojibiwebenofejomxous.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/gghjjcx/30246234525.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/daraniwekamidir/mastering_biology_chapter_7_photosynthesis_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/bang_bang_full_video_song_mp4.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_off0000d982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD982 5044 bytes
SHA-256: 4e5cc395ae1947fc4bc36cd7319e86f243d06b678e97e5003a793380aaf041cb
font_01_sfnt_off0000ea90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA90 11596 bytes
SHA-256: 8dc818a0df290d8369d6f818b0a7b3889bccad5b798de6ff6f65e4fc949906a9

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