Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00b3b6002f91550…

MALICIOUS

PDF

75.7 KB Created: 2021-01-28 15:17:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a5ed1616bc6797eb0a3ff593da277fb9 SHA-1: bb2ec6e6010026bb56d662cf62471beee106194e SHA-256: d00b3b6002f91550ce5b883c0667545c7c5ab3a304deae2e71a49fb93cff4b73
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://crophysi.ru/aws?utm_term=adverb+clause+of+condition+pdf'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://crophysi.ru/aws?utm_term=adverb+clause+of+condition+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5fe6ce2aaf6c1.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/bjfjahc/super_games_143_in_1_game_list.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/lihihIh/dafuriwidiliwisavutatono.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/goicajj/fall_menu_starbucks.pdfIn PDF document text
    • http://cz-nitrof.website/24029702078tg5rz.pdfIn PDF document text
    • https://cdn.sqhk.co/pininipata/gjgdVpB/55851658019.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/OWijjkB/allegiant_flights_xna_to_las_vegas.pdfIn PDF document text
    • https://cdn.sqhk.co/vixonafom/6gBgeib/crossword_daily_word_puzzle_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/ajggjFT/nelikijorerevuvumosutib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_600d1822e3696.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/davolazupivowi/certificate_of_good_standing_request_form_delaware.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9D 5220 bytes
SHA-256: ba30ad38823bb0b66242be48963b72f880763473753ef462702f83b504d67ce1
font_01_sfnt_off0000f164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 9572 bytes
SHA-256: f3c6c2a970205c20963c4797f319643e3b5eac1b5469ca12ca40791ca8b49a73
font_02_sfnt_off0001122a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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