Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c0d458e5291250…

MALICIOUS

PDF

82.5 KB Created: 2021-09-17 18:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cbb9418c26a54d1a7987ca3cede3b159 SHA-1: 64e75faf8932e75b4778cb82447dd2b0cb6ed032 SHA-256: d0c0d458e529125091aeb73a0460d95af06609cfc012a9dae987c94526fe7488
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://wastran.ru/uplcv?utm_term=call+control+apk PDF link annotation
    • https://biomedchita.ru/imeg_master/file/zufolor.pdfIn PDF document text
    • https://groupunsur4.com/contents/files/nibevazepisesevelutirugo.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/girewetozubake.pdfIn PDF document text
    • http://audiohrestomatiya.ru/content/file/61951080361.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/35723135113.pdfIn PDF document text
    • http://webminmax.com/userfiles/file/juburasosomu.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/1478671464.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/boxojowisobirefurekavosoz.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/62946014252.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/xalijunoposokireminetupom.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/93645921072.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/8p2d1bjncvacublu8iaqljuph3/30585183080.pdfIn PDF document text
    • http://brlairport.com/images/file/36467547108.pdfIn PDF document text
    • http://ps-chiptuning.hu/userfiles/files/wawokatotodowixowa.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/wexuxi.pdfIn PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1631553343.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/vowolejibasu.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/gevagifizesoremipavapa.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/161368495adf1d---sonugomizuvatozaram.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/82137837694.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/kipumelidenozepavusekomex.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/vesuvosajav.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/buzozivalexufuzokatafas.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_off0000db71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB71 10100 bytes
SHA-256: e7099c1abf8b9182397ceb6a3cdf32c4b2ad6fed2cfef03c231a3b95bcc89513
font_01_sfnt_off0000f220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF220 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 19268 bytes
SHA-256: f0dea092158b83bc11d52a30f0c4059c4b153cfb4e695a434b29ea69b56497fb

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