Malicious PDF — malware analysis report

Static analysis result for SHA-256 462d48d425deb960…

MALICIOUS

PDF

83.0 KB Created: 2021-09-20 05:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6637422081128da8da06cf5d34fb096f SHA-1: 642e1c927fdf26fb2d4fc659dbbb3df475dffa6d SHA-256: 462d48d425deb960cb18294ac70da210b748b8fcb9fb8801529f1735e938b235
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms on compromised CMS uploads strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=super+smash+bros+64+android PDF link annotation
    • https://rintrans.com/files/nariporem.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b922c0e479---97369525213.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/18719992459.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/lerudojek.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/rewurigilasidinov.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f92e4c8f9---juwesi.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/vokuvowuz.pdfIn PDF document text
    • http://sergeybazarov.ru/file/89787837400.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/wipokesam.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161420931c4fa8---30834110167.pdfIn PDF document text
    • http://sperrincaravans.com/images/file/kuxezajopabuvudidopuvi.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614769df1518c---xesumovilakokani.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/keruzifukorez.pdfIn PDF document text
    • https://paintingwithapassion.com/nbloom/fckuploads/file/85898322685.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/44837025554.pdfIn PDF document text
    • https://kimcert.org/E/file/42484140728.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/desumofijen.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/mozisipe.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/41708583387.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/44954442524.pdfIn PDF document text
    • https://casaalu.com/luutru/files/nesupirotijetit.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/02d8132f9e45dc4fb64a8ee7c1c2a6af/rawadaras.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/gutuloganovowido.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/e8kki13mgu0t2kjjb0cselbug3/zalonugafemi.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_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 16940 bytes
SHA-256: 39b93933312aa8fa9735c310fa92e68b6dfe1a1b3f593cc22696c7101781264f
font_01_sfnt_off00010cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CC 11076 bytes
SHA-256: 6339ac71860232fbcc58d200e8def8379e9030bac0b41e7eabf77c1ce6d0cca9

Open this report in the interactive analyzer, or submit your own file for analysis.