Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0cd6c8168b10d17…

MALICIOUS

PDF

70.6 KB Created: 2021-09-02 17:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7cb82fae4e501636b8f0dfeb56a742a4 SHA-1: 00b1e1012f7d0e74defc8817dfbcd5bda468bc38 SHA-256: f0cd6c8168b10d17e7a3d73701e3a57afd5c5c85e3d29a83e8208e00e1472d80
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm hosted on compromised WordPress sites, with numerous URLs pointing to potentially malicious content. The embedded URLs and the nature of the link farm suggest an attempt to redirect users to phishing or malware-distributing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073c28b5ea73---muvorukojipaxedanaveri.pdf In PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/26621630345.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16129d24d6f7fb---78608523481.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c42ed2662---13289551985.pdfIn PDF document text
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/tugube.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/blqf5jder6muabt7j9f7uidu0t/82926127809.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/vaxeso.pdfIn PDF document text
    • https://menu2uplus.com/images/file/38324977580.pdfIn PDF document text
    • https://mimpiindah168.com/contents/files/15130951837.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/wepuxukaza.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc801f6946e---wewabibigezunep.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/50927627675.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/3172116915.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/2b232cd11f00cec3fde6075832b9fd4e/gamuputeda.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/zotutibulujositukimugisu.pdfIn PDF document text
    • http://fundacionecla.org/resources/original/file/18949318103.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/seworiwodo.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/bedibok.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/67218086477.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/32223889172.pdfIn PDF document text
    • http://unsersohn.ch/images/file/falajaxufoduwef.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbc0264499---geberizukubeta.pdfIn PDF document text
    • http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/22903250720.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=exercises+reported+speech+mixed+pdfPDF link annotation
    • 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_off0000b437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB437 10660 bytes
SHA-256: d7d6195b36b4c87885129860609649046eeda31529bdefcf4aace3be69eb59d9
font_01_sfnt_off0000cca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B6 15840 bytes
SHA-256: d1c254f768fcf6978033cb27e49789a9ecae614e0e9eb1fe13e428ce3dc3d5fc

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