Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce020cc7332d40e9…

MALICIOUS

PDF

98.7 KB Created: 2021-09-01 12:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ba2ff953a545496d52b847293538ac5f SHA-1: 8c11238daef661590de71fc044d58018666ce002 SHA-256: ce020cc7332d40e944f6ab48f3b0b71f9a280c8e28e5c401bb569d05fd8dbf0d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories and disposable hosting. These links likely serve to redirect users to phishing sites or download further malicious payloads. No scripts were extracted, but the structure strongly suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f143cd4afc---vabeg.pdf In PDF document text
    • http://whuntex.ru/userfiles/file/56409470606.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd7b7e14c9a---nasememewilerotuwanon.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/xibisamu.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/69ea77ae7246e8ad99bc601f64b32231/wasewaxiwumexep.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5d9327be7---69711387372.pdfIn PDF document text
    • http://prosquash.by/data/narurazebetivabelom.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/82346579335.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/zoloxepe.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4fe41566d---gozalesefen.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/fitege.pdfIn PDF document text
    • https://www.educationsexuelle-ecole.ch/ck/ckfinder/userfiles/files/62844413098.pdfIn PDF document text
    • https://dafelia.com/files/5735020867.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50fd40b224---92562008606.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///bosix.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/50652810352.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7a67cd4b09794b8507fd3fe6c5f6fa4a/kotemunijoxowumubilil.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/bawidusanumatabejilik.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/nimoxizege.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/mopopuxa.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/6l0mlgbm2i8egna7aqgoh72bt5/21076744280.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a82eab03710---mebedafurulopabizigipur.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/5eb45d528ead246a81b1b66e9caedf30/34632250789.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=there+are+72+gendersPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13627 18060 bytes
SHA-256: 36ca5036a859b1cbf58e95443dc3befc10d791bc1d1265d23f92c518679dcbc6
font_02_sfnt_off00016564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16564 10304 bytes
SHA-256: 36f89a430f0012dfeeaae5b4b841ee669cb9b6e94940f062d6af857272bf8004

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