Malicious PDF — malware analysis report

Static analysis result for SHA-256 44309b7a5a5c5606…

MALICIOUS

PDF

67.7 KB Created: 2020-11-26 02:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a5796e0da8c03cf41f056490ff61dd33 SHA-1: 21de2fe7ccee2a983a6b30df2c74642fd3120929 SHA-256: 44309b7a5a5c56061f47784f75a4bf8364ff52e4e1abe9dd7d6ba7e9be00eac1
154 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 routes users through malicious redirector infrastructure. 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
  • 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://cctraff.ru/strik?utm_term=south+lyon+high+school+lip+dub In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385617/normal_5f9eb15dca559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418762/normal_5f9e133d042e8.pdfIn PDF document text
    • https://fabomitax.weebly.com/uploads/1/3/4/8/134888897/7945584.pdfIn PDF document text
    • https://bajumavo.weebly.com/uploads/1/3/4/4/134486103/fukiwodusem.pdfIn PDF document text
    • https://kixatefibav.weebly.com/uploads/1/3/0/7/130776592/229816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485305/normal_5fa794f91eb47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5fb71a4ea30ac.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://uploads.strikinglycdn.com/files/5c148230-aa71-456d-bb4d-88219f5b3656/tujonaduwimawi.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/nct_127_cherry_bomb_full_album.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/kanna_hyper_stats_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d2dae0-ae64-404e-b7d7-0c2bace37bbe/vixebuweva.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/49432174180.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/zuseroruxesaxaxob.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/blood_is_thicker_than_water_meaning_in_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/harvard_referencing_guide_anglia_ruskin_university.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_off0000bf10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF10 5136 bytes
SHA-256: 3716c74f517d9ad7e3062b856095d0e9e619d64540472528b633579c84f3d682
font_01_sfnt_off0000d07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07F 10300 bytes
SHA-256: 42dca086808dfd2df1f0730c85f21b9644e6ec1abe254add315bd785e2709ee8
font_02_sfnt_off0000f3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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