Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f9f3e32db0418b…

MALICIOUS

PDF

74.0 KB Created: 2021-04-03 19:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1d6b62f73d5e2bd646cfa5bdccf35f56 SHA-1: df5dc2f3c63a7d1225df07a53ffaa4fc7893bb2b SHA-256: 07f9f3e32db0418bc7029fa01a45739cf4c1b2b3fd54d177b8b36cf6c161a886
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a lure for 'free bible download kjv pdf'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate malicious content, likely for phishing or malware distribution.

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 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://baarspo.ru/award?keyword=free+bible+download+kjv+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405195/normal_5fc6216f5dd20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460070/normal_603d1a0d3a0c8.pdfIn PDF document text
    • https://newowuwaw.weebly.com/uploads/1/3/4/6/134634034/732299.pdfIn PDF document text
    • http://gavediteriremuv.medianewsonline.com/biodata_sample_for_job.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_6033e71d4fec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_6015d2c5d8c1e.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/ashrae_hvac_fundamentals_handbook.pdfIn PDF document text
    • https://favotofuti.weebly.com/uploads/1/3/1/8/131871633/e4d6371.pdfIn PDF document text
    • http://lamorebeduzakoj.22web.org/85372891890.pdfIn PDF document text
    • http://kabejorudedofom.22web.org/nixorivalewanomuloxaluf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_5ff360e4dca85.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/51940087142.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_2e3bee45542743cfae3327855bb53dc5.pdf?index=trueIn PDF document text
    • http://pomigipasa.epizy.com/dekra_gebrauchtwagenreport_2018.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/ashrae_hvac_2020_fundamentals_handbook.pdfIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_6cbb61b50fc6482ba15279da22dee9f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9fb9533-bb3c-4523-b53b-255b3a9165bd/waranutefeloraso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d79342-9c95-4c55-bfc7-a982dd325d7c/tejifa.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_off0000e337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE337 5244 bytes
SHA-256: b394168d40e075dd18a5d96b72857c17c9b64bfc1e439c266c1933e7679b4c76
font_01_sfnt_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 11076 bytes
SHA-256: c3e0d9d5d13ccc9e35d0ca8036807c046c06dd971063633e5d6bb2a8d9f4994a

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