Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6445c178b06334…

MALICIOUS

PDF

90.5 KB Created: 2021-07-27 19:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3a8f945cd2984451c8b55c1309b9cd2a SHA-1: b2c5b7c2fd4fdddd2d3ace7079c6ec8b921d920c SHA-256: 0e6445c178b06334fc7e4746f26c649905fc4631045cc152339a2cbae73afb9b
156 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, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the heuristic findings strongly indicate a phishing or malware distribution attempt.

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 http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/bunujazitov.pdf In PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/hiabgeehmg1o1ut57hpftp4pfq/42324481263.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/b36f51c783ce4798875b623a232a13f1/53424409106.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/19537987515.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/tirive.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/sijiligibo.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/r6lg7hl044dmu93ojp1kgrlrc0/69066194221.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160871eabaddda---75836678727.pdfIn PDF document text
    • http://ccshecea.org/upload/files/87921201579.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/vumivumunupij.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608241209cd5a---xuvigipubuwe.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/75762d8a8b85bdfc2a139aca1fdea02d/71346644764.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/6a8b2a0e745ac4786a0a4caaf4a05f98/66651348350.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/65024609944.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/96624440091.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/451e57704838bd8c4871b5443270a31c/denimu.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/e5477vt64jva8dpsin45mjeil5/53559158503.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/46coloq5k1vqoc0qjn1105pqle/naduz.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/2e0d4032fc0fa607ff8f46dd97cda92f/rovejixilajifefatibokig.pdfIn PDF document text
    • https://zold-kommando.hu/files/98827063082.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/30563055954.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/42577496925.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b35d0e6189---6258682835.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/buwigagomokodubiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+fix+a+seized+enginePDF 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_off0000fde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F7 17136 bytes
SHA-256: b905e1d9278c1f2e644ee64b3bb386fc371873b42a36bd8e6f74732c69987efd
font_02_sfnt_off000142ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142AB 10624 bytes
SHA-256: be5f0726943926652acf58eadd4109978915abb3b643ef48a533f37059e69d27

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