Malicious PDF — malware analysis report

Static analysis result for SHA-256 071186866cc4b572…

MALICIOUS

PDF

72.6 KB Created: 2021-09-03 06:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f427474de646844ae8ea451fd176a210 SHA-1: 9d588a425212612a13a1dc099dd2d7ac9466c5d3 SHA-256: 071186866cc4b5723ba8abe0746725d773a038449489950016a75c826fca74a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://synerhu.ru/uplcv?utm_term=christian+ethics+definition+pdf PDF link annotation
    • https://kristinanamaste.eu/files/kotasasutajujidojosuzabu.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210815_055039.pdfIn PDF document text
    • https://mcitalianwine.com/file/xawukafubo.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1969be9446---51334821377.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/delibanofajezik.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/22491649262.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/zedigolap.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/969e59ce676d9f94121e38dfe34413d5/51924483499.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/61115465247.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/zuseno.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/94i4742n8j6j7evlcdrh4khh6p/nusugos.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/78463570587.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9721939e2---mozew.pdfIn PDF document text
    • http://e-district.org/userfiles/file/retaxojovoxazazegud.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/rafugakoxemu.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/dijokovopobugasamoked.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/af70c217142d7691b6ef462f9d46dd76/sutizojetepukejineba.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/zagexalakekotokin.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/531ca145a7d763e841e0afe8d404481f/35022353146.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16078586834268---86870659413.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609df7287e7e6---12630384302.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/7189228817.pdfIn PDF document text
    • http://travelspace.pl/userfiles/file/dikijakopofor.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/sinuwak.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/sexebugagedutunibu.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160753fb3be901---limowogani.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/6058325970.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_off0000bb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB07 10704 bytes
SHA-256: 1df617b0d7092b782569c5cdf2aae8fb36bb44b5448e20500e2f234047edf551
font_01_sfnt_off0000d38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA1 15880 bytes
SHA-256: 8d7e3118b6d63e3811df8e012d6871906b407f0436b557094f41738e2892b638

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