Malicious PDF — malware analysis report

Static analysis result for SHA-256 e259068b3bd6378e…

MALICIOUS

PDF

89.1 KB Created: 2021-08-01 08:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 50e2def0bd838863fe0180cc96c2a24d SHA-1: 95a02a6cf08d2649121015f767ccad67a45958b4 SHA-256: e259068b3bd6378e0f3b03a3ac358e49e801c9d3e18f88100788591c71bf5e0c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The presence of a 'download' button lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=oh+holy+night+the+stars+are+brightly+shining+mp3+download PDF link annotation
    • http://s8radziejowice-paszkow.pl/userfiles/file/72827509876.pdfIn PDF document text
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/4158369575.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/92694889509.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c89f45647b1b5c13511290492a5f2878/27514052355.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/98784296775.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/jibobuzuzinalitopomobar.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/990c5b7e7c5eb30d6eb770072e6f4c22/bifovodaropusokagorukef.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609549e9d007e---metepibuvigabinozo.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/46388049018.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0d6bd530---87941072254.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021060720114673499.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/23795179253.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160722c6cdf530---66217279930.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/78810017361.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/topaxijadajanopurimawazaf.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/a2398542c2845bed558031457f74fee7/zasafa.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/27449621457.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/kekemokubewosogesaf.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/nuwexumepew.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaaa56571e---82467594621.pdfIn PDF document text
    • https://tinnituskozpont.hu/files/ximubuzozenafigale.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/82744620414.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b360b50e52d---22482253057.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_off0000f338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 11376 bytes
SHA-256: 86185b59ce9b6d179179fc8f9f38b8c55726f22d056c3bc3c7fae8a3a9f3ba34
font_01_sfnt_off00010d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7F 18412 bytes
SHA-256: a613319310f3c79ca011ea88a337bc7d7fb35892cf54a8530c278a961664d79a
font_02_sfnt_off00013dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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