Malicious PDF — malware analysis report

Static analysis result for SHA-256 972075eff0ff3de8…

MALICIOUS

PDF

158.5 KB Created: 2021-09-06 15:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0edbf5b407af148d24c0b50d94c8ea2b SHA-1: 458032f4a1bf87d3ef8d6c0a39c6622fdab0a5bd SHA-256: 972075eff0ff3de8364c1b9b2748aa1c1f1d0fd23cad5bbcb5848c82dfcd0203
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple links on potentially compromised infrastructure suggests a broad distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073eef9cc70a---84952992314.pdf In PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/73411025394.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb6294f3d3---kexijumawotijudivu.pdfIn PDF document text
    • http://unewstoday.com/task/userimages/file/40133494842.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/20194995929.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/kifenotopan.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/didajadutobifemeven.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/75323746043.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b7acfd20c09---zupuxafesij.pdfIn PDF document text
    • https://landi-bg.com/images/file/25413683267.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160fe1124f3dae---pulaboniwuvugevus.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/86512598d230e154e457aec48fc89a8a/duzeloba.pdfIn PDF document text
    • http://adria-ex.com/images/blog/file/turajinoxesaz.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/35346544930.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/69626906252.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/vulilukugofisejalijutod.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/34f2ae63a62b61889a23488f200aee6f/lases.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/kipitemagutufigelorod.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/4454971294.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/141929369423.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160763c898d2e6---mivulusoletonegezoravase.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/7469716356.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/ejsfije19762dj7q7caod94gh1/bexozowalojofaxuzorukod.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/xakojit.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab73aae2ae---28552179261.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=management+of+type+2+diabetes+pdfPDF 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_off000208d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x208D5 11064 bytes
SHA-256: e8ad1f6bd6bb4c1f069c7124b2e171cf2de3b09026afb38967575aaebf07e141
font_01_sfnt_off00022247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22247 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00023a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23A59 18928 bytes
SHA-256: 8c5bf0628066c710544fc87c49a3db289e9d8d1ddf831d9edf55b83fd18e5f23

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