Malicious PDF — malware analysis report

Static analysis result for SHA-256 486545d4910f3cd1…

MALICIOUS

PDF

84.4 KB Created: 2021-06-28 01:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84616cea5f6c05e747afc62292237cf8 SHA-1: dea465b2f0967178bc4e2dc98a38a1d7b1abe4ae SHA-256: 486545d4910f3cd16f9ad95653a706ef6c65d8b8a0dddf8328084b775e9ac363
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://irlanc.ru/uplcv?utm_term=let+hope+arise+death+is+overcome
    • https://hojoairport.com/images/file/44812593801.pdf
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/vitivikesusanuz.pdf
    • http://businessvaluationapp.com//fck_files/file/xobulebe.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/h585c7ip417scqq1fn7pbrlft9/gozuromi.pdf
    • http://crmrealty360degree.in/userfiles/file/kanulopiredalomaxukibubi.pdf
    • http://zonweringbelgie.be/ckfinder/userfiles/files/2510882553.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/12cff98e7e60861b9d840eb108dcd208/59330619204.pdf
    • https://nguoixunghekiev.vn/userfiles/file/74403477823.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/ut598lguof9n1uued3bmuskep2/28229880044.pdf
    • http://championshipsportsrings.com/clients/23492/File/dujevaxuxirivomovatonudaj.pdf
    • http://flirdining.com/uploads/files/taviwusunujebewukejo.pdf
    • https://batikatravels.com/userfiles/file/jatenefere.pdf
    • https://dimensioninteractive.com/WYSIWYGImage/file/gonezinesoto.pdf
    • https://an-professional.ru/img/files/file/dewumirufekadanif.pdf
    • http://azizolace.cz/images/file/metovunugix.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160891ca1ee02c---vabojawon.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/664901de67a1d0abb81baa215eb1c669/90528675209.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608237311615a---10546263296.pdf
    • https://tecnicadovolante.com/images/file/wifakibiwuwigujen.pdf
    • http://brandiassociati.it/userfiles/file/wekazufutuzubeporefige.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/acbde84a49699e9c3fc3aeba0f8ab45b/22920568923.pdf
    • http://teaandtiarasottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/54042336500.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e56c.bin
738905b7fda961312f4855914e87993d3d7106667b306306c5725f12ea3462b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE56C 10652 bytes
font_01_sfnt_off0000fde3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE3 16792 bytes
font_02_sfnt_off000115f5.bin
150ded22e046b621edf35171e3ad3996d042fee361764a72fdb4712e20fa26b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x115F5 17272 bytes