Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2cf4c4d8bce897…

MALICIOUS

PDF

112.9 KB Created: 2021-08-07 23:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b66c75f0278c49489f70f9150815da98 SHA-1: d34ff2f65e05c4e5339baeb5a433113453563c14 SHA-256: 0d2cf4c4d8bce8977ccd784ef92e936b7d1c9d00ed8f3a95c770d2d8dd5adab1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of embedded links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160abf00a1d370---radunixefesajefuf.pdf In PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/rizew.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/82404144663.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/03877625dee8b10d6e5bfa1bf28d0d0a/kolewiwidedejanejesej.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/0eeb3d5b0739fd16489785b732ed4342/lewafudogasalafegusom.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160adf2a5af0cb---32786391847.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/73dd9de8e4f4e6cf4de96359d128e27d/69552010779.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cacd1da09aa---bopuwutumokuguzulol.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/xivixonilepibibopijezu.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff255564e0---82521124638.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/54753975058.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///4796508990.pdfIn PDF document text
    • https://confidence-ist.com/ckfinder/userfiles/files/xiwixarikugodekazuzowe.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c30788bc80e---58598894649.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/8105748188.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/fab0i6b03m9bab5bbjgh0nilre/68022423755.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1ca241c9---87699629602.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/9nhg6j9ildcqiv9etmmsc8o6ov/xobizajuzisixogivipoxofaz.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/546daf7efa7f41e02e3afb46741ed12b/naxemijagadawerimud.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/73619430025.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d1709a8c4---fosivebixutozevodumanog.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/u1qec2p9akvojsgok5m8mfvime/dojer.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/ecqbk2eka1an0dgok6ea2ia33j/52210864526.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c0005c84298---21339017190.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/f918f0ba1904b3303dc704601dedba45/25512766235.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=call+of+duty+warzone+download+size+ps4PDF 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_off00015019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15019 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16830 10960 bytes
SHA-256: 62704d3dbb006e1031779f72ea8c375d10175a35d1abf3ec5fab226211b4a997
font_02_sfnt_off000181e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181E7 18852 bytes
SHA-256: cbe5b93e5f291f40c2f49e69f7d9646a41f17bff3cd1b3609ac09275a9216ed7

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