Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69742dd6f59d0bf…

MALICIOUS

PDF

73.0 KB Created: 2021-09-16 19:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 960ddf3286adb6d31714598d850084cc SHA-1: 73661adc735934589ec6822f527b77ced440c8ed SHA-256: b69742dd6f59d0bf0c36724426f19ac556105fbfbcae4947d97861ad0de7bc9b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The heuristic 'SE_CALLBACK_LURE' suggests a potential callback phishing or tech-support scam pretext, though the primary observed behavior is URL redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=best+launcher+for+1gb+ram+android PDF link annotation
    • https://lawtutors.co.uk/js/ckfinder/userfiles/files/kavujemavetapadodo.pdfIn PDF document text
    • http://ardennes.proximeo.com/ckfinder/userfiles/files/65652841313.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/80247338493.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/pitem.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/teril.pdfIn PDF document text
    • http://poiskvod.ru/images/file/luwudepawigu.pdfIn PDF document text
    • http://mtkshop.com/images/uploads/file/mudukukezaxu.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///lazedebi.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/pegutivegesedob.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/zivoxutawitifubopedaba.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/62748963657.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/62972882159.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/95088071228.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/nazabagejusipapu.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/xamakofax.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/76513772804.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/77709532924.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/88277799855.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/52260965767.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/96086738687.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161403807d111b---24113179760.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_off0000b80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB80A 16964 bytes
SHA-256: a9d93e17c968f2ba01c9dd24e22f0f59fec10cda8a49376d6f0c3da6fdc7100b
font_01_sfnt_off0000e42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42A 11268 bytes
SHA-256: 7feadb07e9993a1c142ee47a8b52b2548055caf9a7878c44cdedf749fb6d51a6
font_02_sfnt_off0000fe47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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