Malicious PDF — malware analysis report

Static analysis result for SHA-256 494461c2fc353ba5…

MALICIOUS

PDF

84.6 KB Created: 2021-09-04 10:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 06167524b3a457ddaeee310619827a3f SHA-1: 11653377e5c18e52d633140b8cbf36c350dde447 SHA-256: 494461c2fc353ba510276038c55ffb53d5d6bd44cb75b800e685e9d60e8cb855
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to compromised websites or potentially download further malicious content. The presence of multiple distinct hosts and disposable hosting patterns reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wastran.ru/uplcv?utm_term=industrialization+in+france+pdf PDF link annotation
    • https://senhewood.com/d/files/baxiwalu.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/buraguzodedudumonesux.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945e5b55080---28527352345.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/45708411631.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16090c7a49069e---zalapufuwot.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/a78ff8ce26b818c70b0cedee5a81d097/ribufagujupijen.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/92913402652.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/88064940318.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/l7d1lpj5gqkd5r5bfcjum01k1e/69503373532.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/81447820296.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/89946283052.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/6kt67cvegnbjq5p9f1hllo8p23/68629891360.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/d2c1a7c2714e93bcb426d1310dcd5415/63165376954.pdfIn PDF document text
    • https://people11people.gr/uploads/File/rakako.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160715d7078e35---91745483445.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9bf4ac5118---ruzolir.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/16104425187.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c261ece26---15709962151.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/cdcf424b4209c9b4b49ecc6ef4c97a4b/95445078644.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/31729648840.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/82849989896.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/97770598260ac75c0bb018.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/48aed5949e05d1eff0ce9248e60a66b1/90116235112.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/62979040587.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_off0000e514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 10724 bytes
SHA-256: 924b66b1cbac81fe13e6f2cc866aa58a826d451aed04b8055728d3fa6bc9063b
font_01_sfnt_off0000fdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD7 17712 bytes
SHA-256: fcb0462140daacf753ddb8f9f6a58abbc5385d15414d877677de9e758e22a123
font_02_sfnt_off00012c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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