Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7da15c074ec5ce7…

MALICIOUS

PDF

112.6 KB Created: 2021-09-01 07:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 75ecbc0b3356d0ef8002503d72c383da SHA-1: d88b227a4859ad683e15e409448e0bb7789c66e8 SHA-256: f7da15c074ec5ce7ebf72a5a78655afc414fec3ebf0d044b9708fe331fa4597e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The presence of embedded URLs and the nature of the heuristics suggest an attempt to lure users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=time+period+of+the+story+of+an+hour PDF link annotation
    • https://gencerenerji.com/resimler/files/89825053350.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/977038937.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/logiwubasibuzenevilifeduj.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/qge8q9koe1qma4ssej04hmo3mf/tekobizelanigokal.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcc5d067d8---zavumilidipuzaluvuxulam.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/43784045901.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/19722649879.pdfIn PDF document text
    • https://davaocarrental.com/images/file/25779944638.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/5918980a2e535d2539380df6d7cd4249/34339043460.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/desizene.pdfIn PDF document text
    • http://wawa757.com/uploads/files/melegivupa.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/e7e348465392df838aed8939001f37b5/kuzagimigerokunaxeburidaf.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/15551659865.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/gedarisinujimirulurodoven.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bacdb7d1c13---54419176689.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac150cefba3---41939672976.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc65801ba8---dutolapofafekafuvujik.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/putejefefeguwevekupak.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f17b46d41a---fasujodanuvo.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753f13229a8---vuwegisodo.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/10198816b90d6ae8536fb228de877a9a/dopakuditafogafiteteve.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b236f37a419---mamukinapipaxukik.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/56d5246c89f066dbf2571d5b0ec2cb62/duluvudunoxatar.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/27339516084.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_off00014df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF0 10896 bytes
SHA-256: c16e0e3c9c2eaa3b71eef41f7aa4c241a3f002eeb2ef18dac9c2264ac055ca0c
font_01_sfnt_off000166fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166FB 19752 bytes
SHA-256: a5950466d28c5d55f86363ae984359baf0a6e56bdf17c206cebcb7f49b913386
font_02_sfnt_off00019a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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