Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f54eec433ba05d3…

MALICIOUS

PDF

75.2 KB Created: 2021-09-01 18:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: be90aac6bbaaabf9d1b314b5ef491ef6 SHA-1: 3011730cfed9eee24ca78aef23faf60452c02404 SHA-256: 9f54eec433ba05d363f6611e3520a807728925944d7b2443f5ca4410c294c014
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other domains, likely serving as a distribution point for further malicious content. The presence of external URI heuristics and link farm detection strongly suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://crewmak.ru/uplcv?utm_term=latin+word+for+safe PDF link annotation
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16075f8afe4a93---wevog.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/redefulimevadene.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/88602431b388cc0f8d5296207942f3c1/lunebozesajewin.pdfIn PDF document text
    • https://laznia-radom.pl/userfiles/file/95765828132.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607edf8cc78aa---nirojufiwizufuz.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/189adfb8bc07c90b688d27a52a397ef3/sokagiwotugatewudazimeso.pdfIn PDF document text
    • http://weiddy.com/uploads/files/202108271449123170.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/71384120487.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/majiw.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ac44304d2d---jalidekexi.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/35beb24a2b7ad1832de5088672ddba4b/komekajogigipowem.pdfIn PDF document text
    • http://becucci.it/userfiles/files/laxapafodurapoxad.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9106c17f5a---pakis.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/fulegile.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/xowerux.pdfIn PDF document text
    • http://fedime.org/imagenes/98478907332.pdfIn PDF document text
    • https://laznia-radom.pl/userfiles/file/27384713028.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210623_AF566B663A15F5D6.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab01e6be86---matopufamajawagesexoropo.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16124c436e15a1---gezaledurutodubi.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/mewavororovig.pdfIn PDF document text
    • https://koreayokogawa.com/ckfinder/userfiles/files/vitizuduzufaxerik.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bd32884a5---wovavapasomoxe.pdfIn PDF document text
    • http://irodori.kir.jp/files/file/joleru.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD658 19532 bytes
SHA-256: 6ba608fc3d91db30d801b47314d9858fa4edc5764bbf865e9c1e8360d7156e73
font_02_sfnt_off00010816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10816 10344 bytes
SHA-256: c850161bb56ba578c68b3141785d561d06b3e66bd0a4796edceee9b45ebaa4d9

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