Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd2e6e9527bfacd…

MALICIOUS

PDF

77.0 KB Created: 2021-09-16 02:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 495a884f6c5f7fceeab404e119269553 SHA-1: f1f2be1df28553cd35c319161119a6e624bdc0b6 SHA-256: abd2e6e9527bfacd7b5afba0328cde41ca04bf772cce9526a32eb670faf009b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the links point towards a phishing campaign disguised as a software download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://catamma.ru/uplcv?utm_term=camscanner+premium+version+free+download PDF link annotation
    • http://lab4050.com/upload/editor/file/68739546207.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210903_67F88759739AC6BD.pdfIn PDF document text
    • https://haruhonpo.com/upload/haruhonpo/files/28004005323.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/vuwawewusutitebexikitu.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/gugalamugeberun.pdfIn PDF document text
    • https://capital-publishing.com/ckfinder/userfiles/files/65996401389.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/v46vpeaemvplr95rn87nsqr470/7712645601.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/1l23im18hue8lu7dfj7qbjs8g4/pomolokesemikukurez.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/54878685796.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202191012242457.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/65b6bd0170f711d16e180df8f8befa72/26828597250.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/66764658675.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/tekukorakiwixoleg.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/72696646626.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/xasubedibi.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/22595181956.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/481a94b89tva5hutij8r7id877/7694179803.pdfIn PDF document text
    • http://estatepie.com/files/userfiles/file/piwirirefave.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426a4a4da29---81056046662.pdfIn PDF document text
    • http://asja.ua/userfiles/file/movoxunaretimoxitowasikiw.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/xujipusovozuza.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613432c66721c---51620526751.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/17096776908.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_off0000c7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE011 10964 bytes
SHA-256: 02b014fa7fa099d597e6b40271bda6435f4d2bfa98b6aa6fd68caa07bc133bf4
font_02_sfnt_off0000f984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF984 17400 bytes
SHA-256: a20f6394ea6c9a8574c890fc55a9b9f9cff6c2632d7dfafa4c88e3303880aca9

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