Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2fbcd066ae1f85…

MALICIOUS

PDF

84.8 KB Created: 2021-08-01 17:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2014854454baacd8e9f52e4957c8e1c1 SHA-1: 3fe0ebdeb1e25c0ef32544ee6ca225073e76af4d SHA-256: 6e2fbcd066ae1f85bd91bef4dccad935971987900b56f24e06e513d45b3317cf
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, many of which appear to be compromised CMS uploads. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://wastran.ru/uplcv?utm_term=substitute+teacher+movie PDF link annotation
    • http://www.anclupnapoli.it/userfiles/file/xufenilapazabavul.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/4254938244.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/62b98c26c8b76cf195a3ae45f51179fb/87190071508.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/uvlov2t0b50oo828uc387cisd0/vakejejukitiganovuxide.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/setutanuralosama.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210623181043_23aaxj.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a02be38d906---dinefubarije.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/0a932bcb9c52529ebc02f6d9640a5c28/18078467287.pdfIn PDF document text
    • http://ypdtools.com/ckfinder/images_store/files/kowopivazezizab.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/44c0c0fae4a4933d151ac750b5f3b17f/rubaxejuzatejibaralisovug.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbfd74d12a---69627766866.pdfIn PDF document text
    • https://lapiadinafelice.it/file/vadavasovu.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/39074910828.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/36597168398.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d432a26ff7---76507093251.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e68b769c708---15950010293.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/83539607792.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/84435305901.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/3b8nft3mt9f4g8r4ck0furti16/94352706730.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210527010724478.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/691894c20db86453bc954716f84d4b9e/fuporejazijeburawup.pdfIn PDF document text
    • http://www.trotasierra.com/plugins/ckfinder/userfiles/files/dowokaduz.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/4339478460aa61367ef67.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/4d3b6e6524ddf5cf8fef4cdc852d5c16/60893325529.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54e8fe40de---faripevuxusikupimarufifil.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_off0000e6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EF 17264 bytes
SHA-256: 8747ac20642b077c4d44e42ca0cbfb51da37636bd3f883d59e714ccfe92945e8
font_01_sfnt_off00011439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11439 10728 bytes
SHA-256: afd2d63711e222e9cbe065d7ecf6a3fc3e4d5db1505731946888aa17939a9d85
font_02_sfnt_off00012cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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