Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cc198376906581…

MALICIOUS

PDF

64.8 KB Created: 2021-01-05 01:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c719aeeca928daa2bbc373f73aabedf SHA-1: e7286a2f52e9fb456589f253fb8a02d81c51ff79 SHA-256: 97cc1983769065819f664cad5d7100be323f7ad11bcd15a2d640e81d2f122dbb
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://cctraff.ru/123?utm_term=ab+coaster+max'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=ab+coaster+max
    • https://cdn-cms.f-static.net/uploads/4378161/normal_5f8ac0de0bfc3.pdf
    • https://static.s123-cdn-static.com/uploads/4490132/normal_5ff16860df4c4.pdf
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/jepagedosu.pdf
    • https://cdn-cms.f-static.net/uploads/4426267/normal_5fbedfd89eaf6.pdf
    • https://jufozovujibozom.weebly.com/uploads/1/3/4/3/134360308/tafapizu.pdf
    • https://cdn-cms.f-static.net/uploads/4407793/normal_5fad2f4ea48d9.pdf
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5fd0dbcc47265.pdf
    • https://cdn-cms.f-static.net/uploads/4479688/normal_5fadf965609c5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sixolose/mild_form_of_aortic_valve_stenosis.pdf
    • https://s3.amazonaws.com/defujo/electricity_webquest_answer_key.pdf
    • https://s3.amazonaws.com/nedijowewoded/35359162004.pdf
    • https://s3.amazonaws.com/kigavanus/acog_guidelines_preeclampsia.pdf
    • https://s3.amazonaws.com/fakuguvil/kifaxumotezizogekudade.pdf
    • https://s3.amazonaws.com/luborinizu/sony_tv_remote_rm_yd080_manual.pdf
    • https://s3.amazonaws.com/godoremitiwuja/anime_arslan_senki_season_3_batch.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c104.bin
5543fbc208c33c7871ca1d26a256837b73dddc8c5a8d789f009adad1839254c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xC104 5108 bytes
font_01_sfnt_off0000d254.bin
3e56fc8bf7b4c20e61a18a2e5f634a024cc67cb3c47bef5f73061ace4c7f69c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD254 10728 bytes