Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2bfe39ea1f96677…

MALICIOUS

PDF

87.3 KB Created: 2020-12-06 05:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 708d723a7beddd2b5bedbfc3e7250eae SHA-1: 1821be8030577df3be834dcb6ae5e18633463605 SHA-256: a2bfe39ea1f966776fa0ea1d3b26b5f17bc0e29f4449097464d0d6f549a41dae
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics indicate a likely attempt to lead users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/123?utm_term=spe+model+phonology PDF link annotation
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/wadabuji-dagurunel-vetajoxurag.pdfIn PDF document text
    • https://kavanezeso.weebly.com/uploads/1/3/4/4/134477356/3794978.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416791/normal_5f956b10155a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_5fad9854ad6b7.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/gasodamuza/babel_full_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/63973383766.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/2019_dubbed_movies_in_isaimini.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfa5072f8b574a0f331ef/1606220369202/dobawixevukipolajugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d24a75d0-cfa5-4bc0-802f-06603496526b/9455549204.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/nujan.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/26118831375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3eaf66-342f-4e5b-be36-75dfb4dbed0d/why_is_download_button_grayed_out_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/084025af-5733-4566-9ad7-c1b19838b102/7415737814.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38024e2fce462bc9c67ee/t/5fc9d6949c93c058c485fb37/1607063193326/dr._driving_game_download_for_pc.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 3016 bytes
SHA-256: 97a1b257d0374fa318de267f46c0dc1ac3975f911ae519816f3a085cc6964dc1
font_01_sfnt_off0000f874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF874 5092 bytes
SHA-256: 3aa0f6b8756385267da48f2403c12cea87c1c5dde1e56ae3aca5a4e6082f3a33
font_02_sfnt_off000109ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AD 14936 bytes
SHA-256: 945655c32c89fc3bfcef93c6de20a6474190b605282bc58abacd7ff513b4db98
font_03_sfnt_off00013895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13895 16276 bytes
SHA-256: d8c5125a510a8530b51c3ff3787f48cb0c75e598ab0522c684fec525b41d66f3

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