Malicious PDF — malware analysis report

Static analysis result for SHA-256 be29dc4aec22dd85…

MALICIOUS

PDF

80.4 KB Created: 2021-09-18 10:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 20ddff2cc415dbeff27103c598d836ed SHA-1: 005e4bff50b131c1fc2e1af7f2056086947a9887 SHA-256: be29dc4aec22dd85a94a71c5469aa7bb2b0df4a6c76b3aa55c41a1ffe5129cb3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of embedded URLs suggests the PDF's primary function is to redirect users to potentially malicious external sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://irlanc.ru/uplcv?utm_term=modern+warship+mod+apk+unlimited+money+and+gold+2021 PDF link annotation
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/q6bj8c25ss8o1r4bcn9il4bdnr/viposaxetigururapego.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/75805327476.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/32466215743.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/jifuwosubenamupep.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/guterutemivaromevadogopax.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/52565921818.pdfIn PDF document text
    • http://congtyvima.com/images/Download/fagexafalapomozito.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/98382745961.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/60010818199.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/52866197797.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/21475397452.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/tesenuzojivoz.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/zevozivokuguwinidomi.pdfIn PDF document text
    • http://gysanya.com/upload/file/210908124225666072zgr0zwrn1hx2.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/zidukemegatolak.pdfIn PDF document text
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/45311322858.pdfIn PDF document text
    • http://prosquash.by/data/60046676985.pdfIn PDF document text
    • http://jlsxjy.com/right/UploadFile/file///2021090500205473499.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/22373556956.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/54194171954.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92730638194.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/kudazixuxepudusaza.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_off0000d11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11D 18164 bytes
SHA-256: 7269f2c61e81af0dd0274d3d9c75c4823890c407e19a8224748d4c371a0b7b43
font_01_sfnt_off0001004a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11861 11520 bytes
SHA-256: 2a0c009ceea9a185b282d98ef0d2760a8c9a090f0d6d391adbd28cd3961a6f80

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