Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f5913ca0e699e4…

MALICIOUS

PDF

106.3 KB Created: 2021-07-04 19:34:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 10ce78312b33af636feb2ff47fd22ef2 SHA-1: f1c055bc3925258572da6aae024302be0edefc58 SHA-256: c6f5913ca0e699e4801578fa5025f01985b38db908239c498a1f531636a2ee50
164 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to PDF files hosted on compromised WordPress sites, suggesting a link farm designed to distribute further malicious content. The presence of a visual download button further supports a phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://crysiq.ru/uplcv?utm_term=self+building+house+minecraft+pe+download PDF link annotation
    • http://dailyxedayhang.com/userfiles/files/lozavejuxugofe.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/asp8vft9fuooee7cm9o92qfte5/patuvijifito.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/g4fs1cmt8e8ebprtemjomiv8nq/zasevemipo.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070daa428edb---89317878235.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf37b7683e---24325815934.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7291e3931---65765234134.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/35793499112.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160946acb7bd3e---14997193358.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/a38c9c1f0931eb38111c447ea4ef1075/mudoxuvibuturekomirifige.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a91b69e8e3c---nuwowodal.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48960580f5---19029790529.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ddad481f72e---tigateti.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/0bkugkdcgrg6lmic8busfdne11/11216342270.pdfIn PDF document text
    • https://renault-service.com/userfiles/daposuvupadiwuzegamato.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/14750447752.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/8ba338f2e5c9b863100cf1954776d6c9/47786888980.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b449349e03f---3462294541.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/80529377834.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/ri9e2hj24dkr58n6mu2fms38t6/suwevovuviraxorililonil.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704155141d4---41388730257.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/35114990478.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4d75f15aa---98106262087.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087b29546080---86970229796.pdfIn PDF document text
    • http://lblussana.it/images/file/88260703574.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12384 11468 bytes
SHA-256: 71e972e3919bcd37a251ebd3c1e57671789190357fc1b0a8ec88f760009c5404
font_01_sfnt_off00013e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E06 17744 bytes
SHA-256: 34e27f18c9d4763522973e10ca5c3e5a1d24778112d1134e5438b5e512e070a0
font_02_sfnt_off00016d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001851e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1851E 16288 bytes
SHA-256: c9836f231bd9e84c7145a82c74d248963ad9294a208db54e667fd28df33bd857

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