Malicious PDF — malware analysis report

Static analysis result for SHA-256 366ac5c246ae2d4b…

MALICIOUS

PDF

86.3 KB Created: 2021-08-15 23:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a667755637d2fd7b539ecc5a09f3feea SHA-1: e314ef741896488e4f6d02e4ebfff75c1dd32f52 SHA-256: 366ac5c246ae2d4bc2227420c978e8974a606ebdd87d546102b59d6faa604e48
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=z3x+lg+tool+v9.6+full+crack+version+without+box PDF link annotation
    • http://ankurgroups.com/userfiles/file/vapenurigagorune.pdfIn PDF document text
    • http://ccshecea.org/upload/files/31538871538.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/62435150019.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f33957e60---20932735503.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/gavogejelagiwajo.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093a953a8efb---65500355532.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/40105154910.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160798795a2a42---pezabegolakavejasodobeno.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/rosutime.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/57474083379.pdfIn PDF document text
    • http://elitvorota.ru/f/file/wovokilobevod.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098309c2154d---90936941728.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/nunadajowuxupewuranos.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/newofisulovuwi.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/94124251376.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/82854682870.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/27f81b94cef48107abb2d6006c91c840/82444284394.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-6-19/20210619014923359429.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e404457123---81781798737.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/1858934889.pdfIn PDF document text
    • http://biosite.ru/images/news/file/6099232397.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/2291204172.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/nonce2nppk5qn9qrimr7k6hir4/30408890856.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a177fc978f8---58724428592.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_off0000e97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97B 16820 bytes
SHA-256: 24fee4cbdd299bd7109e2bb86ead4fae5eb27b80a2da32206d047edc8e90d924
font_01_sfnt_off00011509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11509 11740 bytes
SHA-256: b21e90f5fcff78cd98053fde16a6c1f5b86071badcbcd67560fdbb738deb3093
font_02_sfnt_off00013117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13117 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.