Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe415bcdd3d7f351…

MALICIOUS

PDF

67.6 KB Created: 2021-01-09 07:01:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b95a9e51b2aa871c74bb94e7af3f0c95 SHA-1: 22fe8dc7f1261991cfb43603fa69389b4e8439f4 SHA-256: fe415bcdd3d7f351d263bbb3ed2deaea9c17ed57597cf54769862b4bef87245b
156 Risk Score

Malware Insights

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

The PDF file, disguised as sheet music, contains a significant number of external links, indicating a potential link farm or a method to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to redirect users to harmful sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/aws?utm_term=les+fleurs+sauvages+sheet+music PDF link annotation
    • https://cdn.sqhk.co/pupevadojas/jiFWLib/drive_in_idle_tapper_game_apk_hile.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/5195641.pdfIn PDF document text
    • https://zirotowaze.weebly.com/uploads/1/3/1/0/131070424/jupukuvufabide_renodaxegesilif_rigunapolun.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/hhSjhej/swingman_jersey_fit.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/sefukirexuwekij/isuzu_npr_hd_2015_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/learn_korean_language_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/60931251254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e1a882-e64f-472a-ac0d-c32099f9be13/83659220790.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/bayonetta_1_switch_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc95e08-fcb7-417d-a29b-d5fcb43d5c12/prentice_hall_algebra_1_chapter_9_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/wpf_xaml_binding_string_format.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_off0000bb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB52 4960 bytes
SHA-256: 220db96e47167dd72a366c00fb1824de21b77ad550d1d51074928bdbd163f7f5
font_01_sfnt_off0000cc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC39 12128 bytes
SHA-256: 1d4b27ac262d849dec47f5790ea1f2f9f20f2b8f0a06718961fe02836a2e8afa
font_02_sfnt_off0000f3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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