Malicious PDF — malware analysis report

Static analysis result for SHA-256 341bdb5924b14a47…

MALICIOUS

PDF

100.1 KB Created: 2021-08-25 05:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 945e96fb94f3f124683c98f43c297091 SHA-1: 57a081c1f9fb750f30b10a331d94fc67fdf0f49f SHA-256: 341bdb5924b14a47919e29fa003b13a8e4ad0f0474b538330b18fd74c77e0ec2
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 ML classifiers and ClamAV. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to lure users to external resources. The presence of numerous unknown URLs indicates a broad distribution effort, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/563cb8fb85870fee5d42bedc391f209b/lovezevagepusobamefawabab.pdf In PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac304b3ad45---fazusuzewutokeru.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160768cc9bf6c7---xurukurakevafe.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/sowitelozuwuvomobesosod.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/1e576a41bfd5d136f5db6ce47f970100/kuwerigoremi.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/p5o0abi5sph1id0nc3gnga5hg6/37112535545.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/zubebibagevevodefosugofox.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/3gi10c81v9irkmsmecb9g59jj1/72299412134.pdfIn PDF document text
    • https://ecoledesgourmets.com/userfiles/file/64465850805.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/suxojexijijuxuzowiso.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/8290965233.pdfIn PDF document text
    • http://altinay-law.com/images/file/bozukewe.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/ravenegesubuduk.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210719233610.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b04c877cffb---41269013592.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/1148559589.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160be4781b59a7---61939874901.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f9065cc68bd---11125215215.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/6ib75fudliokssho21opemviqu/liboredubu.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160de9bc935542---repuwebozapetaxajam.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/22992512998.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/f412a454a0a9b999c756a44e91af00d2/60825670753.pdfIn PDF document text
    • http://wych123.com/upload/files/rejezojatodalimojeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=the+committee+of+300+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FF 2224 bytes
SHA-256: 1ed6640749cbe70f90e8a05440e4fc01650ac905196a0dc811b258e685f7cc6d
font_01_sfnt_off000122e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E8 10560 bytes
SHA-256: 238747251c1c692b174588c31917b4eaccf9ded0fe8648e65319f2958957933a
font_02_sfnt_off00013aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFF 17796 bytes
SHA-256: 0e04d1af014fbd5702c74ae77c686e10fc1d5366a48b78e7724b27eac13197f3
font_03_sfnt_off0001694e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1694E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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