Malicious PDF — malware analysis report

Static analysis result for SHA-256 7212d277fa60dbce…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 02:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c115ec3980db5e6f9100017b5c56ef87 SHA-1: 6d4cd8f8e1efd7dd9fbf99b52a957e36d28c293d SHA-256: 7212d277fa60dbce7b80b845f3a5b3111915cb3004d100d0d225377e52100c1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs pointing to compromised websites, indicating a link farm designed to redirect users. Heuristics suggest these links are on disposable hosting and potentially part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://catamma.ru/uplcv?utm_term=customize+firestick+screensaver PDF link annotation
    • https://ags-car.60km.com/upload/files/zenexixidunaneworejo.pdfIn PDF document text
    • http://jamxmpharmatech.com/upload/files/bililomakewukipozo.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/rokofuzowowomuxaxusifop.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/newomitumo.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613717094286d---75764230874.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/lixiruv.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392c8d6c554---negekudima.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/54730282328.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/gigilewusuzijo.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/vosizegevubulipa.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/18821185039.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/pigaxipazoxapoludixemuman.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/58722597454.pdfIn PDF document text
    • http://maysoi.com/hinhanh_fckeditor/file/xajuvedikob.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/nepizigakudemimir.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/gugisenu.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210916054925.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/fenivurixe.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/nowefewabagedadus.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/zukebixagusumagazojavusev.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613339c8268a7---muwafigatitotatir.pdfIn PDF document text
    • http://lokalizacja-gps.pl/userfiles/file/jejojexuxanubububelu.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210903_031208.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/22660082951.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/42622584766.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_off0000d352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD352 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB69 10800 bytes
SHA-256: 3dfb0c3601704303beedb0edd8b47435e2b91a42bf59ca0ae389441e5b97b5ab
font_02_sfnt_off0001046e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046E 17752 bytes
SHA-256: fe10de67cf08d9e1489e35ca1a3e08a0627f66918f5a4e6b35ce78f9a65e742a

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