Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe568e9fe8820524…

MALICIOUS

PDF

93.1 KB Created: 2021-07-08 07:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 151a21ed925fd24a49cd94854c64b50c SHA-1: 249c6403645a22d6ecdd5684c88217d0b3a43ae6 SHA-256: fe568e9fe8820524d394f37bdf380bb693b3522937b1a344410944d28c5f58b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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=thanks+and+gratitude PDF link annotation
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/allhj58ocg3gbgfb6dsg2al7qc/73736701053.pdfIn PDF document text
    • https://people11people.com/uploads/File/bojejaki.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/64235418013.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/1989f28deb9b4d1c315c0270beb86e5a/78256682620.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/ht367r7hje7led2odblonhm8ba/27933475268.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160719d83d002c---51799459450.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16095d4f31c9fe---baganopagafisafefew.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7cbab4408---25286898028.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a72cc07673b---43866992864.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/11736474376.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2db24a88de---xemigadejaj.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16088246d9aadc---98215666358.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/bepigeso.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/12849392194.pdfIn PDF document text
    • http://zuche0551.com/upload/file/gujafadizekabawarofa.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609625fc38cd4---xunotagobuk.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/puzubimagunalefusimib.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/6ppklqrpb2h9dkuvaal6v868lg/65136953589.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e7320c319---pesonurenugipusavota.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160708a69789f5---vaxuregiwuxus.pdfIn PDF document text
    • http://bio86.fr/fichiers/regenimaliloluve.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080f7c92faba---26167191671.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/fekujiwerakabiw.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B00 17052 bytes
SHA-256: d0bdbc2f12411433850cbe94895b84b31a1f92892bf5744c1eb51a2e433989e3
font_01_sfnt_off00013794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13794 10516 bytes
SHA-256: c120e9b4d524a02a01cbb7717eb85ff90ecc7c255de3d401bddb86731ed3c97d
font_02_sfnt_off00014f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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