Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3d03c2e9f3e5cc…

MALICIOUS

PDF

78.8 KB Created: 2021-09-01 11:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ccd8806c949c745e47d8a70676b739f8 SHA-1: 11fc039d0126274b0c1ec366b854946b98adac3c SHA-256: 6a3d03c2e9f3e5ccf6fa7c597610c5399d463af489ac93556dbaeb0e299496fe
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests the PDF's primary purpose is to facilitate initial access, likely through spearphishing, by directing users to malicious or compromised web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://lorofilmes.com/Uploads/ckfinder/userfiles/files/lolewamabude.pdf In PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/40e0bd527322d16e907924c7596831a1/60290464393.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/45485275783.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075bfcf99712---46826841132.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd646a0bea---38162695092.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/netamutotekafutirigawum.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d0c2dc351---mitegasunojivaw.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/daxefelusosokotelu.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/33328390394.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/e2974e7720e2b32bdbd9a61d428e6066/delejuxofujobarinulanaf.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89723307995.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/reja3sl69p28as1g0md1p9qioq/jowirokuwan.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5c6138a5b---48349956923.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/vaxagogusudasulesekiwego.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/fccbc7b31f2d2fd64ca8931bcd728ecf/xonuposodekol.pdfIn PDF document text
    • http://hopkins1983.com/clients/861771/File/10644302514.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa39637d01a---50767016242.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210608_7544CD7ECD88D2C7.pdfIn PDF document text
    • http://trimblehighalumni.com/clients/84492/File/nixojojurakufudabit.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/fudadojudefun.pdfIn PDF document text
    • http://www.amanuttarakhand.org/ckfinder/userfiles/files/43376471964.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/jigogepovilorisofuzali.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=cardiorespiratory+and+muscular+fitnessPDF 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_off0000cf15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF15 11024 bytes
SHA-256: 354e569afa512bf8a0ea86554d5b8128438af3386f5dfe5c4b918cffe86b0025
font_01_sfnt_off0000e8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BC 17276 bytes
SHA-256: fa1ac0f86946c0f67badc79500815e893b7100c062acb987e8481ec2b36a31a7
font_02_sfnt_off0001150b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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