Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d301b42fc53652…

MALICIOUS

PDF

102.0 KB Created: 2021-08-04 09:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3524511a17c2e7468c92732a4324dddc SHA-1: c78dba02f019402040caaf0f2326da7e66742ae6 SHA-256: 94d301b42fc5365239ad2a6143a3deaafdcb94f3b807ab807cd3e1a93949ae9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://nomylo.ru/uplcv?utm_term=codes+for+super+hero+tycoon+2019 PDF link annotation
    • http://baobiachau.com/luutru/files/vuxuxapiko.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/8ab3f46204ca73bcb443aa7d20b8b18a/70939695623.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/malagikomijonadup.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/sapojatodemut.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/ea7dbe5fc394f52e661b78fa7d5809dc/watalizag.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c401f3d0867---99090515446.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5af49f99c---nuturupomewenavopelipu.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/mimewula.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/melabotemeladunor.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce4df30302f---88635207443.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/48fd95cbee8bec1820d1314019e96c7a/25658259201.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/xogezuxalisijujarapinife.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/tazajotubezuj.pdfIn PDF document text
    • http://gyorszol.hu/userfiles/file/bakukamoz.pdfIn PDF document text
    • http://bronia.org/userfiles/file/jeruwe.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160870d3a4a16f---46355134395.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609058b927f00---malajitewanuvelozezetisu.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/5517790966.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/dac9da920c61e5a6f4f010704f408fcf/4853703625.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160e61be7a2daa---vaxagetazasijixavor.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/xisawexerowiluxarifoj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBE 16632 bytes
SHA-256: 680e586a1ee573e661d30ea0f7a97a8805d5b79b2e3d5282e6cd27ea8e1e9edb
font_01_sfnt_off000125d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DEA 11124 bytes
SHA-256: ea9a08aa8099b40b6b783ad080011a6f9869eb808798418e1a94905a7737c3eb
font_03_sfnt_off000157f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157F4 18676 bytes
SHA-256: 19a2b41da1091ca96d3ae8015fd5e2048e8614116ca1229cd69a5b61e659d7a7

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