Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9dae3e54f1c57cb…

MALICIOUS

PDF

65.7 KB Created: 2021-03-02 05:45:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c0e22b0cbca07db7e508b99f27d444c9 SHA-1: 6ed5ff5a38daa60deffdefb547cc51075378bd5f SHA-256: c9dae3e54f1c57cb7e53aa5f0ab586dec6f51fb98d1cddd5a750e73d87907c15
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high probability of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though partially corrupted, references 'Tascam porta 2 manual', likely a lure to direct users to malicious URLs such as http://telgrm.site/80597138776tytac.pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=tascam+porta+2+manual PDF link annotation
    • http://telgrm.site/80597138776tytac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476146/normal_60010c32be380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460066/normal_5fe999f2b09ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_601d5d866ebba.pdfIn PDF document text
    • http://lessonsonline.site/3337214747dxvik.pdfIn PDF document text
    • http://tamakar.xyz/83499616636rt651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476123/normal_60142e9b2dffa.pdfIn PDF document text
    • https://pesirirovozag.weebly.com/uploads/1/3/4/3/134316115/1853117.pdfIn PDF document text
    • https://vutojexi.weebly.com/uploads/1/3/0/7/130776275/40c5fca80b38d8.pdfIn PDF document text
    • http://gufutaca1.xyz/tinus3q99m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_6025a0a396c43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387806/normal_5ff4f57e8c9d8.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/ghjggig/fruit_legend_2_game_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/ihdggz6/classic_rock_radio_stations_online_streaming.pdfIn PDF document text
    • https://leresidatebij.weebly.com/uploads/1/3/0/7/130776374/ae22a.pdfIn PDF document text
    • https://cdn.sqhk.co/pininipata/i77idfb/mahjong_solitaire_games_free_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_5fdb064a81c7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/what_happens_to_pecola_at_the_end_of_the_bluest_eye.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/corrugated_iron_zinc_sheet.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_off0000c3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FF 5160 bytes
SHA-256: b082faa305d45bb5e03242f0467debc1a1c947d60d76a73feef5658d982d36f6
font_01_sfnt_off0000d572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD572 10872 bytes
SHA-256: 467b654fd1870b52cb3acff15f4493749ebfedfe95b8d8910a02efc8884bdfdb

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