Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b2742942b1bf7c…

MALICIOUS

PDF

81.2 KB Created: 2021-08-16 08:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 55a66a191e5e358e0047812818fb2e36 SHA-1: d24d470867e2840782534dd2b1f337e24e2fa851 SHA-256: 96b2742942b1bf7c45a084df7d89d5cd973ecd53bbc7bb3fbd16e46a4eb36a09
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external URIs and is identified as a link farm, likely intended to redirect users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The presence of numerous URLs, including those hosted on compromised CMS uploads and disposable domains, supports the conclusion that this file is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=film+bahubali+3+full+movie+sub+indo PDF link annotation
    • https://oteaexpert.fr/cite_imgs/file/ralolipekolekevit.pdfIn PDF document text
    • http://dollreunion2020.com/clients/4/43/4392dc7a9e9236654a628da0af121bbb/File/xerojujabojurumak.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/29316733485.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075a93b5152a---30832373462.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae74651f8ce---91556791275.pdfIn PDF document text
    • http://berrybucs1973.com/clients/3/3a/3a2d6910be1067feaf6dc79f90d505e0/File/3346822511.pdfIn PDF document text
    • http://toshiba-center.ru/uploads/files/4875114583.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bf638bd070e---lenimutarulalula.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/408fc9538334625c305fb89a28b6a8a0/lepilepekevikexogowumasa.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/41092325624.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/26789735948.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/23393071949.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d48387eb67c---rokemibibasekobad.pdfIn PDF document text
    • https://yellowstonewildlife.com/39226135639.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/gojobovepuxixubito.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/dinojufezoxezefukoxaxagam.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/86390935170.pdfIn PDF document text
    • https://krone-murten.ch/userfiles/files/nofigigado.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/f6f1106216b3d6ff08d96ffcfaa9ee02/43239403487.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/i29bul0ruostn602uc9673m1sk/nakepezik.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/98326106453.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/43389794587.pdfIn PDF document text
    • http://tulga.ru/editor/files/45594024740.pdfIn PDF document text
    • https://campermagazine.tv/public/file/denelo.pdfIn PDF document text
    • https://trunglamdecor.com/uploads/userfiles/file/fatarenovoza.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_off0000d6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 19276 bytes
SHA-256: 91c60806b00c3cd6caf2e1d71d3cbf98712052a48841fef965a9eab880505d08
font_02_sfnt_off00011e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E89 10876 bytes
SHA-256: 9bcd0824aa1b1d4420718c68c18cf983fd52f24cee5fb582622f7221b80b0774

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