Malicious PDF — malware analysis report

Static analysis result for SHA-256 da699e72bce5c198…

MALICIOUS

PDF

102.9 KB Created: 2021-09-02 08:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fcca312593076b13abdac7928945cbfb SHA-1: 1f1a0095682b40235aaa7ef7f5ecb6791a785aac SHA-256: da699e72bce5c1989d7538324599faee064cbeb2d6c16f95ddbba9454105102a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external URIs, many pointing to compromised CMS upload directories, suggesting it's designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 https://pixomot.ru/uplcv?utm_term=mhw+teostra+ticket PDF link annotation
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe00a019df---91463039477.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ff0a3b28bc7---51542902122.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/3nrrdos3i5edkihc6s78q5l7n4/zivimisanixepoxejolugofux.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/77861728882.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160809f1a05b66---limolejulusalixoduvos.pdfIn PDF document text
    • https://medpressa.ru/files/file/81715439362.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/51693198223.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/qtemgj8fuof7a1tno0bs6nahq1/wakutivotatozozamidikoni.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210723061732.pdfIn PDF document text
    • http://a-pro-peau.fr/userfiles/file/4647838175.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/tugalovu.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/8t917rig7adope5g2u7egf9nss/16575856071.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/2ct8bia0m5n7ssmk3r8s2lpr1e/26863599916.pdfIn PDF document text
    • https://dejavuruse.com/userfiles/file/3899643284.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/kajerarugosabetebolekimoz.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1bd29ca5b---labefukasipuk.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160917efc14692---23778819190.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/galaxinaj.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/juvirebegumufazulusi.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/51de3b81d657c92ff031289457946c28/xirutuserina.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/94338746591.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/sagudunujaxise.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/mekomepolidavafapilejef.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/85166016699.pdfIn PDF document text
    • http://yepuco.com/uploads/files/77939140650.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://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_off000123ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FF 22940 bytes
SHA-256: 11be2c1c16d4454684deec743ca3d6081e8eb98dbb1559e1de38687cb6c51644
font_01_sfnt_off00015ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000175f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175F3 10348 bytes
SHA-256: 673b1fd2feeab0fe4dade1f758483460b0f0112812edc207befdea21d6b760c1

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