Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c2833666aa92ca…

MALICIOUS

PDF

81.9 KB Created: 2021-09-09 23:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 08388aa24651a7d4530f42f288d24c8c SHA-1: f9576abcc2f80b7d62ea6bb03d0b61097c8d7227 SHA-256: 64c2833666aa92ca66798b4d44ed672811a09ad99a410e7675af9d557db67a05
176 Risk Score

Malware Insights

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

This PDF document employs a cloud document lure, impersonating services like Google Drive to trick users into opening it. The high ML score and ClamAV detection indicate malicious intent, likely involving exploitation of PDF vulnerabilities to execute a payload. The embedded URLs and link farm heuristics suggest the document is designed to redirect users to malicious sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/6c77aa0a3a99c14f009b118aba7473e2/pobixobutemakis.pdf In PDF document text
    • http://ropesadventure.com/d/files/51949798741.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/gamivavovoti.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/44307420401.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/xawuxizavaze.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/fokagobuta.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/julutizutetenigepifo.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/vikudubakosoji.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109072002264327.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/bukevaxil.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/jirura.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/piruvojiwi.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/93868177459.pdfIn PDF document text
    • http://kunbot.com/upload/files/74813883069.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16134ce4a98d35---mupuzofixewosasukab.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/31855825308.pdfIn PDF document text
    • https://testgit.begurholidays.com/uploads/userfiles/files/xixajujepem.pdfIn PDF document text
    • http://www.romanschatztruhe.de/img/files/98164075287.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/wojufegabowegukajasa.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/fizipukawixelu.pdfIn PDF document text
    • http://waypl.pl/upload/File/jewiwela.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/47562736525.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/18017431231.pdfIn PDF document text
    • http://xn--80aer5aza.xn----htbdepbihnfb8cyg.xn--p1ai/ckfinder/userfiles/files/4695855740.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202109051801026829.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/rojabiwapomoli.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/098d34ea9a099f233ef75a297b55a65a/40634477969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=all+cast+receiver+apkPDF 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_off0000dac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC3 10284 bytes
SHA-256: db372fe9831c7ae70ab827ed6472783b728f6001dea8bd088f031834a71b691c
font_01_sfnt_off0000f21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21B 18060 bytes
SHA-256: 8597a3112bb7a628b865d689cb3d617bfa18262351aafeb646945776bab783f3
font_02_sfnt_off00012183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12183 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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