Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd915b64ddce9d4…

MALICIOUS

PDF

83.2 KB Created: 2021-09-01 10:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9425a4fc4c3e9c02bc08543240061412 SHA-1: d45e6dd11f3340f7d210795e4f68283f187d103e SHA-256: 0dd915b64ddce9d48a06489a6b23a5b99ba4157e926882b7c10ad914d275e266
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' and flagged by an ML classifier with high confidence. It functions as a link farm, containing numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The primary purpose appears to be directing users to external resources, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://sportnazona.bg/f/uploads/files/48928629978.pdf In PDF document text
    • http://bogieclassof67.com/clients/71235/File/topakor.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/zojafirivejomakifudosuw.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16090c372a383a---56518353582.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/50414332975.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/74880824594.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/52608195998.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087838964265---94543410499.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612b817db04d9---35399389273.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/69183409904.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7f6a30be9---lezugutozizosabe.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/bimevetezagex.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c7d2c7a0b---53313728192.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/55854624949.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/bupetewuvurawapejoto.pdfIn PDF document text
    • http://xn--q20b13r9leepaeb.net/upload/file/202109010200503391.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/ca1e5156c5ed41b356ad3e3bb4b455af/56354566616.pdfIn PDF document text
    • https://le27.fr/docs/file/kanugibunapo.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/568c26687ba144f2875c7d9143b28abc/62265330194.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/nulirogawodigavibi.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d21f88a96ab---mobitujogi.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/zozivawogisugoxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=declaration+of+the+rights+of+man+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_off0000e265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 11068 bytes
SHA-256: 32366475f4d6eb64efd6ef92e277e2802a608832ceda491d3236931939c0e0d4
font_02_sfnt_off000113d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D6 16472 bytes
SHA-256: bb9a91861f9494081d0f9c4de23e49fff84172d669881e0628d23a184252d70d

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