Malicious PDF — malware analysis report

Static analysis result for SHA-256 296a21e1fc2a4ed5…

MALICIOUS

PDF

82.2 KB Created: 2021-09-03 15:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b723e6b2208feda0db8a117bf41b45d6 SHA-1: 8b7fb1a7a3886129fd32c3cc39dce41886ffef38 SHA-256: 296a21e1fc2a4ed5f4c320edac417365bcc967f9a9bdcfb0c3cb0bdc305df558
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or malicious content. The presence of external URIs and link farm heuristics suggests the primary purpose is to redirect users to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://crewmak.ru/uplcv?utm_term=anesthesia+made+easy+jeff+steiner+pdf+free+download PDF link annotation
    • https://capital-publishing.com/ckfinder/userfiles/files/xajiva.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/rumiliwejit.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/hgfromuin0jctt2opble95fgra/19275585223.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/74315604586.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/4ea90034e6cf53b98b3a1ae7c9a3c264/fusuzavexunowadereka.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/30015566441.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/4994507440.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/ligubazomobegefoku.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987b468e6f7---tamipidafofusewebajalit.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/nubivefetekimixel.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/9287400822.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/72374106822.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/bodupovomenakemapusate.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/metux.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160780d4b37098---76374523719.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/9sfh057dnsq1ucegrco7qq7eq2/24025971490.pdfIn PDF document text
    • http://dztechfin.com/upload/file///23104882118.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/557297586.pdfIn PDF document text
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/12254771380.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607f240a564fc---gutosuxixuwipoxipaxib.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/jakotobujidibivupukap.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/bcfc0c0c72f01c3ccd558bddaf8be425/79005286703.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/kanotenogoxabotadisowege.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_off0000da94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 11076 bytes
SHA-256: 26e6abe072700509ea4d8ad051a233d6bcc5016e92808b9debf23c62522c67de
font_02_sfnt_off00010c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C49 18116 bytes
SHA-256: 5ad05ea08ef034a8b436a750e6c5b95afa78bb38c8e8d387789744e6a58d4f81

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