Malicious PDF — malware analysis report

Static analysis result for SHA-256 353ccc2e2a3039fe…

MALICIOUS

PDF

97.7 KB Created: 2021-06-29 19:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ad01ae446b93f444cf5f24d8b981ef11 SHA-1: a4c63fd7c8a68e94e6fe2df511175595eb7abf6c SHA-256: 353ccc2e2a3039fe3be7044e19a9f5d34958b615df57cd8303ad317bbe358091
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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://archism.ru/uplcv?utm_term=from+substance+painter+to+maya PDF link annotation
    • http://furniture83.com/upload/files/82755017492.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/jewibipowivi.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/3c8ef6b845068d88c87af2ba30418fd3/39424137421.pdfIn PDF document text
    • https://aedwea.com/upload/foto/biropogidanegaxi.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/pamitanetevu.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/58816603201.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/655e8531e56788bc420295ac67946550/saduxesiwaxozitidukotelab.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/3dj7ukfgc66q3b0fmfvqimrc46/62882883404.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/28952262287.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/481rlgig374tk7al1cqncbl17j/78145458835.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/fc09be61d6158c6bc69b7b5fa2dd5afa/zetadi.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/6101db243dbdcd6d2c70a809078f7d51/sokavezeserekeneget.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c50b676c6e6---xugivobexi.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/juzoroba.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/66354365220.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/84adde738d50390940f1fe710526c2e5/26328271205.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/dffe0a0a024e157eca56455a05319ca9/15839012096.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/p5e5vsnvjd5g21f4rqhgcrqivu/84471063008.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff3e44722b---82400952560.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd23d707223---muvumodulaxopubibuxo.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/60a23c8fe697729df01e119cc3ba9049/75338820138.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/15e13002c86fbb50f35a826aecd2f41a/todelusejanam.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/bld6u980qel4s5530rmp9grls3/43157137443.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/b504e63d1671e3928c648fb4ea37644e/85355511845.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210510/file/vuronowowobasukubi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11224 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A31 2408 bytes
SHA-256: 1aed42306aaa799002470eeec58632514580029d8d54a0e0043e6fa212027cef
font_02_sfnt_off0001349d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349D 10820 bytes
SHA-256: e0fa6f9e486a82c30364aec0a58e5384e9ff97e287b72478e45e44856e59d165
font_03_sfnt_off00014d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D67 16692 bytes
SHA-256: 433d12eb062baf05de6ed3c3d4f1e1d64874080796e8c5e8b6575ef3b325d826