Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97ddda124c16126…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 03:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2f2169df9223086a2c7c372c449c3d5d SHA-1: 9715a011171c71559c818da7dda4beb2811a7c0a SHA-256: e97ddda124c161260b01e73e1b0a36c908a8e5ffeae80f4e371f7330b1e701fc
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 a phishing trojan. The document contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://laborke.ru/uplcv?utm_term=first+aid+merit+badge+worksheet+2017 PDF link annotation
    • https://www.ijmsir.com/ckfinder/userfiles/files/dukodajuramixedopa.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/zovomale.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/wozatagevesurixifijol.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160bffac5626c7---63085053375.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/2e6cd408da2e3ca9717c4cfe56d94f05/67109147397.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/br3bd6k5dutr386512ofee7hs1/mebuzeginawijamo.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcbea4ac23---45239693931.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/magawukidibomekateniz.pdfIn PDF document text
    • http://arablift.net/userfiles/file/xipuxazelux.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3d86fa9919---lodisavin.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607381277c688---94549524222.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/jupujobunulolej.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/14014027046.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/kegopemidunub.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/dafetupedisetewijar.pdfIn PDF document text
    • https://samudra99.com/contents//files/21684006163.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/20261624191.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e688401a03---tetexapaladapimajinoz.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/fodugopagowaneliwel.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/45004962249.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607bddf958fa5---86898034930.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_off0000dad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD6 17672 bytes
SHA-256: cafdc1c4311e327b88669a1ac5f545ed92050972bef3bf15c8de430180676d08
font_01_sfnt_off00010889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10889 11184 bytes
SHA-256: 83018a8567b978d88401eba5f1ab0a6fc00c8fb7689e12b192b9ef4ab66631d7
font_02_sfnt_off000122a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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