Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c3c80f6d27e499c…

MALICIOUS

PDF

71.0 KB Created: 2020-12-10 16:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 24fcc7600603ede84d643fb47bd4bed9 SHA-1: 24c6f7aeee63a3f0accd43cde778713149d70809 SHA-256: 7c3c80f6d27e499caa320522618dafd5344751686e4dc10bc891873d45bfdf8d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with a primary URL pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate maliciousness, specifically a phishing or trojan threat. The presence of embedded URLs and the structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=video+er+for+instagram+install PDF link annotation
    • https://tidosivapozagul.weebly.com/uploads/1/3/4/3/134390518/fevirar.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/jopaluz-wiwoniles-dunibuxiwolagat-wetunis.pdfIn PDF document text
    • https://vixalabalu.weebly.com/uploads/1/3/4/3/134396729/7025716.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/645112.pdfIn PDF document text
    • https://mosovokiz.weebly.com/uploads/1/3/4/3/134333023/vukaneweb.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf9365147b14804f8970c/1606285622567/81576208859.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/choodi_jo_khanki_video_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/most_graphics_intensive_android_games.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/62018795882.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/vopatarabuxevubej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2983c348-1e8d-4c1d-bb82-5c3c453b0385/fivajubupixigegovepesob.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/gawukaruletedokepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78c8ae54-b71d-4fd1-8ba9-64e017429b46/cafe_racer_helmet_full_face.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB2 4980 bytes
SHA-256: d05f9f627c1752b631bcebf29fa1694f1b0401e5798d8f80e0699e2b26c6884f
font_01_sfnt_off0000dc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC85 10744 bytes
SHA-256: 429417d7882b614d4c7f123eef619372dfe437cb4e7bbb6c53a5ff427f249f7c
font_02_sfnt_off0001010e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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