Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20e67986061b3d9…

MALICIOUS

PDF

85.5 KB Created: 2021-07-21 00:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8254d41217a3a01c4469d09d3b937942 SHA-1: 9f66c6a5e5f19097828d2247d0e82299064ab2e2 SHA-256: f20e67986061b3d9d4d324caecd39efa3d3330704bd40153abb7815e131ca5e9
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, specifically prompting the user to install a browser extension or update to view content. The presence of numerous links to potentially compromised or disposable hosting sites, coupled with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. While no scripts were directly extracted, the document's structure and heuristic firings suggest it's designed to exploit user trust for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://www.nhabe.com.vn/ckfinder/userfiles/files/guxabesupuzamidiroli.pdf In PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d5e9c5b7e---podavejusopenudugo.pdfIn PDF document text
    • http://abc-tel.ru/data/File/zavibaresagutiwosefa.pdfIn PDF document text
    • http://burke-gallonfamilyreunion.com/clients/28163/File/63919230627.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/0s5td8v7fi34hvpmor70mjb1a6/kuzat.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d4061298da6fb63f599700c4ea482cbf/kosetazivesat.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070701b9775d---74764367135.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/39117160832.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/2e0b07239c7d957b50b8bad6fdc19bb3/94192003765.pdfIn PDF document text
    • http://mileschapelcme.org/clients/9/9b/9b85db73e8c1d5ae3bc18b6db4f26039/File/48269748081.pdfIn PDF document text
    • http://simonide.org/userfiles/file/juwesaledosidako.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fae10cd47---mogotefaso.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/39947edf198b9520fba378f854511783/33655906079.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986f1bc9b38---xagowilejilazenamixesirex.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/98562671740.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090823693880---venirapozovojaxed.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7e11dc576b25538fa343e0efb99c69e6/pisiponisekavu.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/6096f36e9d451f78717fd9147ac52731/molaxekubigevonepapi.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/xopujowijumobijedul.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/30836305707.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/gixovewexilawun.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/6e0b957a2845e3b655fd7e1e4a7cfb8e/wagodoxu.pdfIn PDF document text
    • http://geodez.com/pliki/file/80138858794.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/394d3ed10e79fab1fbd129ae296fd2f2/zumunumon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=low+graphics+android+emulator+for+pcPDF 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_off0000ea6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 11208 bytes
SHA-256: 4831b2ee446131d31283872b558409ec34274683939bc8d1fe80bb1816829566
font_01_sfnt_off0001045c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6E 16900 bytes
SHA-256: 83e2c1d48bae938952174d15a51bd6730e5e4c18c198f92fe68ae2e2e8ab413c

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