Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69b724447ac7d5f…

MALICIOUS

PDF

70.5 KB Created: 2020-12-16 18:56:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 11dce6bebf7f30669c67afa018bfef35 SHA-1: 3cf500fec27dbe5d2bb76e60ea5e5b2aae3a0c74 SHA-256: b69b724447ac7d5fef50f00e8d533b43a260634415ff0dc11836f601eb605821
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, with several heuristics indicating it's part of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO manipulation. The presence of embedded URLs and the nature of the link farm point towards an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=car+wash+tampa+rd PDF link annotation
    • https://ranalugepileli.weebly.com/uploads/1/3/4/7/134735155/85bfc09348cd98.pdfIn PDF document text
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/5d0130e.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/664728057d.pdfIn PDF document text
    • https://lozezuxugi.weebly.com/uploads/1/3/4/0/134016676/turoferixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5faa1cb15242f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420910/normal_5fbda0357cfba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5fd11c03a05d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_5f8ffdba2db50.pdfIn PDF document text
    • https://rajutusila.weebly.com/uploads/1/3/4/6/134666313/8988259.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/4df15d67-f3d5-41c3-ae79-4bfb0ee046ef/rameraz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc788308d6e8c3767c3d910/t/5fca206f87b36f46d407d67f/1607082098767/world_of_bingo_credits_generator.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d4752bbd7406580625ec/t/5fc3ce28f3de5e49b5d8c8d1/1606667817103/54902005210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b0c462a-aee2-4438-add0-259a7ce2b6e4/robidegilasukafebar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dd3a2eb-d18e-43ec-92f2-0e5ff7ce1afc/jomokuzuza.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 3

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_off0000cc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC19 4688 bytes
SHA-256: ce2e7731e71a64342d0245d1b73485346c32cb2c668e63a7e56634598e79fec6
font_01_sfnt_off0000dc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 10256 bytes
SHA-256: 29bedfecf1dd191b7f6dbd2aa9eb6ccb72b5ce8e6a9cbd2eaa215bea5e4615fc
font_02_sfnt_off0000ff2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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