Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acdac0ec1e37c21…

MALICIOUS

PDF

75.7 KB Created: 2021-06-28 17:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 877b3f304c75656d506fd04d56e8c889 SHA-1: 02d506538b046d2efdf6b8002ac7f90adbc7c28d SHA-256: 0acdac0ec1e37c21753a5376828bd588726d284d7dbfcd56ad58993122d6e669
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs that point to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links indicate an attempt to exploit users through deceptive content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://archism.ru/uplcv?utm_term=four+square+beach+haven PDF link annotation
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/5422be6d8048245bfefe9a1bc606d861/73359571207.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/wazufo.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/92980981966.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2c43c7de6---46818379385.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/59876406573.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/3f51a8402b951c871a1275a354a8611e/29988622100.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/weguziziwe.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/23424444902.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/75178471748.pdfIn PDF document text
    • http://ruresept.ru/files/file/48079390710.pdfIn PDF document text
    • http://garderoba.sk/images/_file/85877490617.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/oame3p5j2q2n9sm0d03tbcv95r/22779586140.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/343865a3d39b545357f65bef8618a002/nubadig.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/qack5pck358s3vig5adgf7inc3/39419429763.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d34411908---gedazurumoso.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/gjeu1qivhqcrgr8ejmv1585j8f/46286145442.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/8bfa0b5b217175ed9ea4c35af197e15e/tederi.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/1ab63e037a57af552195ff37d2f14e72/24026801015.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/kop2pmbgrs10j3rv7n6u9sf9n4/40461931954.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/jkhq509rkpm29t9h1c0rtos5pp/76137961983.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/9e94352fc78957dbc1d9a56959363561/21361052404.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/2r0801qo15aoev7i51816j5ofs/rasuwarozub.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/desirebumomaniv.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/61361013143.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_off0000c4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 16508 bytes
SHA-256: eaaab412d3bab86b85430a922210d970c56bd033700c8878fb8476ce62cf58f1
font_02_sfnt_off00010805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10805 10520 bytes
SHA-256: 014172b5fce1aa7af4eeeac3c6c2646eaaf7dcea4667c7cf65605ea22b6b4758

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