Malicious PDF — malware analysis report

Static analysis result for SHA-256 097e746c20084bfb…

MALICIOUS

PDF

78.0 KB Created: 2021-09-08 04:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a6ae2a2fa979a422a3e622f7575bd6b9 SHA-1: c5a3e55349d6dded86664b3a015cbf56ac0ee3bf SHA-256: 097e746c20084bfbe310761af5f1d57851b0a4bed6aae7277c347137767108b3
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised websites and potentially malicious content. The presence of multiple external URIs and link farms on disposable hosting suggests an effort to obscure the ultimate destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://pistant.ru/uplcv?utm_term=hiperbola+equilatera+pdf PDF link annotation
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/c74ace0ef29b139e5a2df5f5b5fc8347/93869947773.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/d09a32a16b300b67fc27570f8b865a83/gurekikop.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/4301030100.pdfIn PDF document text
    • https://arrad.ch/modules/ck/ckfinder/userfiles/files/86747922168.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb81400eea8---13499236723.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/heq5ipdhltadfhh1a09tfu6go7/miwubimisafikujepojalib.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080e10eb63ce---pageridega.pdfIn PDF document text
    • http://delve-cr.com/uploads/90174666517.pdfIn PDF document text
    • http://allasclub.com/campannas/file/57202877928.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/1f5fa963175d81d9f2f0f9bb4fca38e9/rifikamaxulena.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/puteralojoxujaxoxobofizu.pdfIn PDF document text
    • http://renovator.cz/files/file/daluwojuzo.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/35318687406.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/kiroxuguxesewazizagimiz.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/12483102247.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788620db3de---15737712593.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83da89b794---99182953137.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/55012298623.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b53d24e2a0---98069135454.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/38701646829.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c989742885d---bivune.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/59310710641.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/f7a75026904091432abfcc1eb73e1c07/pedatexadafapuw.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073067a24ce2---jofudin.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fe28a61072a---loram.pdfIn PDF document text
    • http://tercovci.cz/files/file/nisipupefakitoju.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_off0000cae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE2 18376 bytes
SHA-256: 99a3e2fb72ae8656cba494e94be81e5790bc434001f0d806a0925ae20738778d
font_01_sfnt_off0000fa08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001121f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121F 10596 bytes
SHA-256: 6b4bb6d4d61254971e41e5e7d2cb9278198dab024089d7a55f46642459b03abe

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