Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebca6619e9dc9d44…

MALICIOUS

PDF

65.8 KB Created: 2021-01-23 13:18:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: be5e42691f6bc7e15e388d0aaf425c36 SHA-1: ebbccad2ef102df59c78b1e237c2c23da31af920 SHA-256: ebca6619e9dc9d44e8e5b0ba9235197f0840f59b0883a0efccf9260d356ad50e
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate the document is designed to lead users to potentially harmful sites, masquerading as legitimate content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=myfanwy+euphonium+solo+sheet+music In PDF document text
    • https://cdn.sqhk.co/ruwonumatag/jNgdx2r/wallpaper_lock_screen_iphone_7.pdfIn PDF document text
    • https://bogogumufen.weebly.com/uploads/1/3/4/0/134018830/4457351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_5fdc2e7d1922d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448121/normal_6006db9505e37.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/shjgchj/67614530330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_5fe81e57e7330.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366668/normal_5fee451c8f7a8.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/1DRP7ks/offline_video_player_for_iphone.pdfIn PDF document text
    • https://lutilizifaguno.weebly.com/uploads/1/3/5/3/135316604/bobalunosizat.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/iRgdghX/70331154487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448129/normal_5fd145f648346.pdfIn PDF document text
    • https://pusesame.weebly.com/uploads/1/3/4/6/134662227/2974803.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421934/normal_5fddd3c3cd19e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390664/normal_5ffb5ed7d8ad7.pdfIn PDF document text
    • https://cdn.sqhk.co/jatizaru/hiiejcr/kevaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5fd8b4512252d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dujazenemelix.epizy.com/shortage_occupation_list_uk_2018.pdfIn PDF document text
    • http://sitasuwa.epizy.com/how_to_answer_inference_questions_toefl.pdfIn PDF document text
    • http://goruloloxoz.rf.gd/53406531521.pdfIn PDF document text
    • http://rokidibamufoduv.epizy.com/16493762757.pdfIn PDF document text
    • http://dolifusekaxug.epizy.com/41213842695.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_off0000c293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC293 5360 bytes
SHA-256: a4c081e9518cd525d4bd3ddae1c2945eb83e8b9a28373ab4fc2edc0b65b7a40b
font_01_sfnt_off0000d4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D8 10672 bytes
SHA-256: f4e4926836eb0a9b71bf10c57d7c4351a9929b46ef90b9ec75b8a58b70473ac1