Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d21f1abb7ffd52f…

MALICIOUS

PDF

112.6 KB Created: 2021-07-23 05:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 94cf049b2353391b5c2aaccf56480872 SHA-1: a1f9aeff9208e9f20f1c9c8d606f1edde71d5a9f SHA-256: 3d21f1abb7ffd52fe13eeb3c39ad61e46f20e3f0192e0ccc2d210847024dfffb
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories or disposable domains, suggesting it's designed to lead users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy on potentially untrusted hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://himarco.ir/basefile/himarcoir/files/41963696813.pdf In PDF document text
    • http://pantipplaza.com/userfiles/file/67805246143.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/32866937690.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085616403b97---6300950396.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/takelavifawig.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/68838917033.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/gapulugip.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c91819171d---53972833668.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160700fec60491---revepuxo.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/fopipedosu.pdfIn PDF document text
    • https://bem-sa.com/img/file/vefopuzafe.pdfIn PDF document text
    • http://ashioke.com/images/library/File/70501389257.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/zemavanipe.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ad454be0eccf13fa9ca534673b373c37/25438523101.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0af3526f93---melisexelomadekupul.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/101b6e3d275ae9f60be9d86cfa7fe550/31906421680.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/25672312923.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/23414623159.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/kibakolevo.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c34fcb670---noparovapusovuke.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/repufiba.pdfIn PDF document text
    • http://koslita.eu/ckfinder/userfiles/files/roganososovivoxuk.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/panijagulopejipiziv.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/7cec0caed03863137f7afed99a4da05c/kipenalexesezu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=holland+towers+meadville+paPDF link annotation
    • 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_off00015551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15551 10696 bytes
SHA-256: 10ae7042bf877801f87933f37d24ec237c7b3815afe2fbf69676008f5def5be1
font_01_sfnt_off00016dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DD4 17132 bytes
SHA-256: 2005b9b3e2b2aa6dfc4753e509c0aff7ff2e70f9be58c8f5a38f3154b847c323
font_02_sfnt_off00019a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.