Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5caf5cb62691c5…

MALICIOUS

PDF

82.8 KB Created: 2021-07-01 14:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b7b6a6c4dd587151a60b9f564da755bd SHA-1: 540ac1854838ae2088042c53dfecf89a9e891f1b SHA-256: 6e5caf5cb62691c53b8137405fdaf5d8056251e0112a6912aad38634da76abea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://oniceh.ru/uplcv?utm_term=epulis+removal+cost PDF link annotation
    • http://garystrike.com/clients/3/30/301ae0ed988f9237e4cb8f8c41f6cb36/File/xozibupowagidisa.pdfIn PDF document text
    • https://ottenburger.com/userfiles/file/duleru.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/53614500828.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/wejuzajusasinexano.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099fbdd12244---82088480385.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/bc64ef74817a953914f763543c75c496/boxefilifonigebakateseli.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e5626ae10---60846553162.pdfIn PDF document text
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d69dc353d6---41926814371.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/farawakabeb.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/93018959408.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/kulenolofotukajuwo.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/77583509786.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/lapadagetobuvifumebujape.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bd9a17f30---91795096291.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a32330ccdf---98846275105.pdfIn PDF document text
    • http://anma.pl/anma_edytor/file/devutexefofojafetenopatok.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6f885cbc3---birez.pdfIn PDF document text
    • http://renovator.cz/files/file/22773528481.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/172129264563.pdfIn PDF document text
    • https://menu2uplus.com/images/file/lenakosalexomulipatujip.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/97315420143.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/87679387919.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160dc92de19c88---98014986552.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/hi4d0qc79sokcbdbhnkonabum3/reverazozokoduzofipuref.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/d52253be2c74276563c33d4bd6b00f97/68752167808.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e43827124dd1317b5bb2f84189b1dc66/30688742358.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/womifujajugakusokuxed.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_off0000e18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 10580 bytes
SHA-256: 32c514cb88ae5e6f5cb3a97a1739a093357e0cd4890a21331e58059ec06d3d76
font_01_sfnt_off0000f9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D8 16896 bytes
SHA-256: 6ef871527f4f7abde5fd5bc3bc70a7da7e8aceb8073781a11addfea58960d6c4

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