Malicious PDF — malware analysis report

Static analysis result for SHA-256 14068cd48135330d…

MALICIOUS

PDF

74.7 KB Created: 2021-06-23 03:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3da2b13f803da1eda345344bb5781e1 SHA-1: 2c83faa201847df169726eae070ee2f52153a8ff SHA-256: 14068cd48135330d0aad9b065e8a4a611bbdc988157908495788192dc56d7f63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b045aee2d42---buxadis.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/aae5c8392d80423f1f906f07bd78754e/45075455013.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a788ce2f0e3---wudugu.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084d02960349---59826526247.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/98e05689c45347e14d654bb97b570aec/63067098539.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af4001b5b2---famopadoge.pdf
    • https://tramtron.vn/uploads/files/files/zedabiwe.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/pokoxikafikonetefeje.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a036f0c2382---vibipodukoxukiter.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/de4q7eo8hr81vq2r3e0dgkilji/2205618274.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759cb2d7248---kubetobawujuwixamarimal.pdf
    • http://vitaminyplus.eu/files/file/58829324841.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608850e2661d1---35991435400.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783b272466a---vedukexux.pdf
    • http://sl-light.ru/design/img/upload/file/94127571861.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16084d97809311---7073691484.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=fisiopatologia+da+epilepsia+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e51d.bin
8de9536ae3c4f684288440dd3a79661e6f80885257c9b862f92f4224c2518617		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE51D 5068 bytes
font_01_sfnt_off0000f677.bin
c280c2bb6277f0385749bc40004aa8bc884941505a47eb8c34fb448c8eb539b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF677 11540 bytes

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