Malicious PDF — malware analysis report

Static analysis result for SHA-256 d602b82ba4282fac…

MALICIOUS

PDF

87.9 KB Created: 2021-09-12 03:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2458fbe46d96ec3e9dbf4eca9d88a227 SHA-1: de85e97a21f286372c3b8ab2e69841dfb240e567 SHA-256: d602b82ba4282fac0959b737ac25f4bec377d8415dfbca0e8d9d54c755d0b46c
196 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS platforms. The presence of PRC/3D content and a high ML classifier score indicate malicious intent. ClamAV also detected this file as Pdf.Phishing.Trojan. The document's structure and embedded links suggest it is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 http://www.supair-lux.hu/ckfinder/userfiles/files/33563978868.pdf In PDF document text
    • http://gesundezellen.de/neu/userfiles/file/jaguzajebavuw.pdfIn PDF document text
    • https://ka-base.no/images_students/files/pubikonisinotuviwetel.pdfIn PDF document text
    • https://turbooto.vn/upload/files/40172094551.pdfIn PDF document text
    • http://irths.com/upload_files/files/16591032076.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/jelokikoxibitesetav.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/19642343891.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/wapuladokiwuko.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/tonimelo.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/41014940087.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/dexavabub.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/94635d4786903971a8d5059cfa7bbafb/mopexazenuzofexup.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/42865136923.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/meselebi.pdfIn PDF document text
    • http://totoumi.jp/upload/file/89768425751.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/vifenagukanowijulisoso.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/xiwalupolovewizekavuromo.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/fubolenisufukam.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/40752033cf10c6706f4ac2e6a7d68c29/gesewolob.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b74699c574---96442001444.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109120624189963.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/34185698145.pdfIn PDF document text
    • http://fractinvest.com/uploads/file/5123253392.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/94823627588.pdfIn PDF document text
    • http://synowka.pl/galeria/file/20973774103.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/doteko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=freeview+on+firestickPDF 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_off0000f2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B14 10340 bytes
SHA-256: 7d8fc938b06bb8385e0e1a309f20ddfa11c6f890cbb1029262dc81726d2b262d
font_02_sfnt_off000122a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A1 18284 bytes
SHA-256: 4a782a7d7f88954ceb12f70e0bd07f50eaeac0d014c44a5a4dd0e231b9540332

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