Malicious PDF — malware analysis report

Static analysis result for SHA-256 adbc4968641229c7…

MALICIOUS

PDF

80.2 KB Created: 2021-09-18 18:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f4b76fb275e7e8af210d28c08aac78bb SHA-1: 80bacec6391fff4409ae84eb09bcf47c5f7a8b8e SHA-256: adbc4968641229c737790ac37384214f3fb4c162f55d30d12f04fb3c0b95ecca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs and embedded links pointing to various domains, many of which appear to be disposable or compromised hosting. The presence of a 'utm_term' parameter in one of the URLs suggests an attempt at SEO manipulation or tracking. The primary function appears to be redirecting users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://wastran.ru/uplcv?utm_term=real+car+parking+2+mod+apk+download PDF link annotation
    • http://classtool.info/upload/files/kakuwaxew.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/67573818725.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/59048271188.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/82254834139.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/fomekito.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b63851a3ad---bifezoxopidolixunabekena.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/84001468108.pdfIn PDF document text
    • https://discovery99.com/userfiles/file/70646615468.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/cf92ed4df037e132782ba62c1f16c067/77521651721.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/90991820422.pdfIn PDF document text
    • https://manenshop.com/upload/files/35951514010.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef37fd0ec5---10329396581.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/11192724364.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/muxuxu.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/miwakasigazot.pdfIn PDF document text
    • http://getwealthythisyear.com/ckfinder/userfiles/files/46356394686.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/mibuvagozefupa.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vewivubus.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/xujizadubepe.pdfIn PDF document text
    • http://symbolfoods.com/files/file///2163450549.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/55862338712.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de2029d5c3---63631073247.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_off0000d307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD307 18456 bytes
SHA-256: da794cc3e400362943ae9ce563d6f9b6d820aa204453c4b51507327110f3d924
font_01_sfnt_off0001023d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023D 10936 bytes
SHA-256: 28842eda5975de018d1f769703ecc572179885b261f9de8c2961de34642bbf20
font_02_sfnt_off00011b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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