Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbebaa7d7fa8b1ec…

MALICIOUS

PDF

87.9 KB Created: 2021-08-13 16:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d27c42b939987c3a4afb94adee327a8c SHA-1: c32cb040dca5def55b2f4e80ddcfa8d417e9c640 SHA-256: fbebaa7d7fa8b1ec01f3e8cd1d2a6a973fb0ec66f3d935ee13e998e9be3d56d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, likely to distribute malware or engage in SEO manipulation. While no scripts were directly extracted, the PDF structure and URL patterns suggest an attempt to lure users to malicious sites, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://sankaibearing.com/userfiles/files/70818419283.pdf In PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a13931b7512---xitosuxet.pdfIn PDF document text
    • https://ruedi-leuthold.com/userfiles/files/vodejogutokixutidebiji.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///76267977418.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/xusosobasibefigeromorul.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/29800816784.pdfIn PDF document text
    • http://manleyboone.com/clients/3/3d/3dd19be848c73b0ce3a0430f7fd535f3/File/gibakesivinewatodejemosa.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/r2fo1s74cgoa65bn2c6g1alb7t/foborebomipive.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/41550860173.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/54560267426.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/9fcd373a8db5b1301fcaf9fe71350870/kamurexoxute.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/11324278334.pdfIn PDF document text
    • https://bdcomunicazione.it/file/puxikaxodipubafudovixe.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609040ced73ed---56689133113.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/7d6383b4e4d508db4d4af059ce3a47e7/bilefovilimodilawo.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160fd9bf7c342c---64002955183.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a784ffbed43---86916646491.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdb1ca8e6a---78443878195.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/vebesijabofab.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/lafajiropako.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/sozumukoketenavomusewetiz.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160847d0076b7a---48255107425.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/temimuzukowewonawivek.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/sujanazidalafo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=respironics+everflo+repair+manualPDF 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_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 20204 bytes
SHA-256: b96b6d750673340aa09f2ccd4bd0324b2559f3a003d8b70a67763bd9b9b4bb82
font_01_sfnt_off000120f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13910 10752 bytes
SHA-256: 3a68119e201049561f1c87091f001d5c8e415d5124a809808445a2df8827cd2e

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