Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3f9afc3912a4f9…

MALICIOUS

PDF

83.4 KB Created: 2021-09-03 21:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bdc29c3ae79d89dffc8aacf90766af84 SHA-1: 99c901cadbf07a8b256a0a2a5295d7603c76fa40 SHA-256: fe3f9afc3912a4f9a69be5c47add00de1aeec405d2fc30b08cd58736112d6603
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting. These links likely serve to redirect users to malicious content or phishing pages, a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5abd37350---nironipezes.pdf In PDF document text
    • http://highendschmiede.de/highendfiles/file/zelikalarejaxej.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/2k30mg2gtk3gpa3kcac9i29n0c/55177383171.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/33127624350.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/50ded78f49a0ff732e62f8398fe971ae/89241727650.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210625_070744.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/rimokome.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/499c42dd988648c40c6690f7fbc3eedb/35186300805.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/rufuzemomi.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f7daf7a2938---pikujuritawu.pdfIn PDF document text
    • https://wagaskar.com/media/72596643990.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/1128189327.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f9ee613ebafcb04d3850aefd9ef82728/31224986279.pdfIn PDF document text
    • https://flyags.com/editorResources/file///18374316915.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/28872316651.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/22531030334.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb35cb16bb---zisumivudafizolinizonexa.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/rufepisepen.pdfIn PDF document text
    • http://propellerclubsandiego.org/uploads/files/xojogapusaro.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160875891595fc---36095040253.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/jonomigugalikaguw.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/a21cbbca715c624fd08bfe44f63df1f6/15776881360.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/25556496447.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5adb4ca74---1011272986.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=enxaqueca+retiniana+pdfPDF 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_off0000e0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D1 18036 bytes
SHA-256: ae31769dc9f847031922eb5dea05ac43ca7bae6d68b7e1701b5d707a50031f13
font_01_sfnt_off00010f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12789 10612 bytes
SHA-256: c3b61ab127581d5ec8aa442264f4eb003a1ee3ff7a6c3e5c1fa93825b25e2e35

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