Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de2cc705007610f…

MALICIOUS

PDF

86.2 KB Created: 2021-07-02 12:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0d2583609051b699223d398f71b89827 SHA-1: 4650adcca51807987f31c9c7e2742532b7bd2b17 SHA-256: 7de2cc705007610f1cf7c13e26d81ebf746076100b7440d01db87c4623466a2d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites used for hosting PDF files. The presence of a 'download button' lure suggests a phishing or social engineering attempt. No scripts were extracted, but the overall structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ricarda-allegra.de/userfiles/file/jizulomatujof.pdf In PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c951d0f739---86181829907.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e40738aa0---nebozises.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/3i3p4nhaet83tmkd6m92ib9ug1/mexidotidepi.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/f73cf8f0b3ebe0a0a7c5085f37a8f11b/pefokopuwokapewizalevel.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a919e2a00---25013528678.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072da6f74550---jepufonugifula.pdfIn PDF document text
    • http://korytnica.net/data/files/sutetapasodatubibafem.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/1pcg1s4qvbs09pm764vsn7beq3/57275189930.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/e03eef77524cf784ffa0194fb5b5d6a8/57482618919.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/kr9s7k8eo712ig21pac87p0jm6/pukutiwajafupid.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/3f5cf55d5bfe3499ae0fa1dbdd9e36b2/40191395595.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608912e926523---28712884702.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086db1d4e6cb---87839096052.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16095cf3182a4e---53641912360.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a05c83441a8---39313050894.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/44496435016.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/xidewewoma.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/11930794803.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/401ad2fd63e296391f0fa2912fd91ab8/pizejoba.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/95860340561.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db2044e4843---17124059255.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=oxford+student+atlas+for+india+3rd+edition+pdf+free+downloadPDF 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_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 17344 bytes
SHA-256: 2eef471e98b1f63b6f22d3a17d6d5cbaf5677c3475e75a3f0d754c3c79f9b9d9
font_01_sfnt_off0001174c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F63 10976 bytes
SHA-256: fdc84a613cb6513da2d5ef740a316077d1035e377a756b3a18501bf89faa831f

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