Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8e3efe7516dc08…

MALICIOUS

PDF

92.2 KB Created: 2021-07-04 01:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e3d6494bd9d998d1171332744f5039a0 SHA-1: 8e7d8f8e9f301d28fb8c616c2fd2269053890ef6 SHA-256: 0f8e3efe7516dc081f1908606622034f48e7be8c95390a640713ca2b181b1dcd
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely serving as a distribution point for further malicious content or phishing attempts. The presence of multiple links on disposable or compromised hosting suggests a coordinated effort to redirect users to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/5652b2f812e9f3d9fb9e7d173d722a4f/wifanuwinotirofobu.pdf In PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/9cce969e48bfe1f72ee6e26eb71f9a68/15871467022.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/35375958b83b676dd464b6a753b8d60d/gawumivibivokudazevo.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/pelediwive.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9aeacaba2---figakuzu.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb5a87c231---47611201393.pdfIn PDF document text
    • https://govox.co.uk/wp-content/plugins/super-forms/uploads/php/files/4dsbiitnue9aivuc73tm9su5re/93037543890.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/7bcf6f5dcebc62b7c8bb3ce323638574/gumefilona.pdfIn PDF document text
    • http://nakatka.com/files/file/lomejevemepipajumenubis.pdfIn PDF document text
    • http://wrhs1976.com/clients/0/08/080801f2a31a95d446b71e9836a5425d/File/73565034068.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/fu8uu4a003j513ofuu3setumv6/zilememimubujagavosili.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6ed616bdd---kenifewezidusopodug.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/3549c50f485d6778ca07e75330dfc7ce/wigifigujanovotefet.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16075af969aceb---mixomawusuraxutonetijew.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/31142014002.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b3a43dac8---fedufulitawiviwa.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/f2d97b2da195d416739b46f5f3184bdb/lekowojesudadafowuserabe.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc6398ab4c---gesagijavaritixak.pdfIn PDF document text
    • https://master-service.ro/images/file/nekawupop.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078e4c866b36---22000851083.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210609192441103297dujf76.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/0eb9a6051b8c66aaa3ff96d8819addb2/28810065967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=contraindications+for+manual+lymphatic+drainagePDF 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_off0001066c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066C 16464 bytes
SHA-256: 17c0b35625550d327ada6266a1416f385ea254ffcc2f13539cf0bc5b29cef869
font_01_sfnt_off0001312d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312D 11312 bytes
SHA-256: aecad5d3af283ac91c354cb50b48a23eee6167a3ce426bec024ad18394dd1737
font_02_sfnt_off00014b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.