Malicious PDF — malware analysis report

Static analysis result for SHA-256 102962be64a66ed5…

MALICIOUS

PDF

92.6 KB Created: 2021-08-12 09:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 797602a8143f1896f3d95622744bd571 SHA-1: 89b1e3b826cdc8d7a3494867c767169de0451b18 SHA-256: 102962be64a66ed5920c04c5b0c7e838ce490fb52840b8bc5a47d0c8c2805a47
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a cloud document lure, impersonating services like Google Drive to trick users into clicking embedded links. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs likely lead to further stages of the attack, such as downloading additional payloads or redirecting to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://ketchas.ru/uplcv?utm_term=spongebob+out+of+water+mp4+google+drive PDF link annotation
    • https://bonacorsi.it/file/kufilipurawolusup.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/85509815986.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16110bf24270d1---64920745468.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/dasadogizijezebobupumam.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/didakise.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/wetasat.pdfIn PDF document text
    • http://ruresept.ru/files/file/27612072398.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610bfc88e102c---19869208014.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/335898aabb21601c5ffa3cca400b3636/fazewirezarosoruwujemumi.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/64391838115.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/98918748303.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca159a9f69---13464536501.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/156012547.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a6fe59e44---dadisizefivoxapezik.pdfIn PDF document text
    • http://redhillplantation.com/clients/1/1a/1a02e1fabf1298af97853074613e4b20/File/70717126373.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/rexiguvogujatabepizej.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/51957181090.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/73538575130.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd1ac33ca9---52434078320.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_off0001033f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B56 11216 bytes
SHA-256: 0bba3547546009bc6c21476735247855ee519371a739cada75a3fd631682a498
font_02_sfnt_off00013548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13548 17160 bytes
SHA-256: c74b44cf1976d2eba63dda7739e6401268a71b26c0cff3797024bc943ce92e97

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