Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3050cbd5f449c4…

MALICIOUS

PDF

171.3 KB Created: 2021-07-05 23:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b99544a05c45a2ff5edc15d877241de4 SHA-1: cc63463ad38ccfb01e2828a53ace88635aec64ca SHA-256: ad3050cbd5f449c4e3383e81f1332df20b5353a85ad61aa9a9679a5382173283
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external URIs and links to compromised WordPress upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and numerous links point to a deceptive user- வழிகாட்டி.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://cructi.ru/uplcv?utm_term=sustainable+urban+drainage+systems+design+manual PDF link annotation
    • https://inverpalmas.com/aym_image/files/wumumopogugom.pdfIn PDF document text
    • https://soltendance.com/stockages/files/kenagefaku.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/6a5e3486d4afd3b8e6f818d6968948dc/zanupokevogusijodanenas.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/34f10fa0ccdff36f1e2197b96876a024/4375711828.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/50922655643.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aede1068465---xovidikofan.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/jc9ag64citqmb2dhf6c7hi5c7d/vewugukurevupig.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ede69bcc57---jogarokape.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/87fb88f22ef86386f70fef04fe10b233/fufomilagelupa.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/82345632670.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/96p4uslhves97552vbogm540ks/bafegi.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16096871e3c09b---vuzetoronida.pdfIn PDF document text
    • https://clinic4lab.com/upload/ckfinder_temp/files/20210617224416.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/d5c33281b1b5ce8d1420bd66186b7c0c/galap.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/22227043532.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8179cd32f---neketeresuxido.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a324bb382c---20168010089.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-7-3/20210703194252795964.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/66906c078e107bf42325695ce89e56da/gupetezosoxegipukufef.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/64deef337c6a6613b18c50b32f452561/midapiwinut.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/sipijodovoxikikukimo.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da99f46227---80108981126.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/88509fcc679a3d183de62cccbcd18169/51946459167.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_off000236ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x236AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00024ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24EBE 22156 bytes
SHA-256: 2f2b26be0b4fc4f630f227e7336b7184648c4378d4b2da751705a584fb7e0122
font_02_sfnt_off0002866e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2866E 10900 bytes
SHA-256: 4c76753282e3c2db55a3da6dd1880dfc875b8b13e13de7d29aa1f2fce453ce0a

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