Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9303f58e876fc6…

MALICIOUS

PDF

79.7 KB Created: 2021-08-31 23:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4ec75c6c3be6569c954c455da4fa69e6 SHA-1: b995fb54386a4c45c60f5bd3d3506732c8c037bd SHA-256: 0e9303f58e876fc646541afa8addce13cc07eecc5e9cfa82ef57959305376082
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically indicating phishing and trojan activity. It contains numerous links to external domains, many of which appear to be part of a link farm hosted on disposable or compromised infrastructure. The presence of these links suggests the primary purpose is to redirect users to malicious websites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://wastran.ru/uplcv?utm_term=royalty+free+sunflower+images PDF link annotation
    • https://landbondcorten.com/attachment/file/b2c75c9b0bc86a18505701d9326acf54.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/52657000054.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///tofovewukiv.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kofuwiwinizo.pdfIn PDF document text
    • http://planbmedia.hufiles/perovimujepibap.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/89200956467.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/17191848044.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/271db32b854907e91e48decb30800f1b.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/lezixotadudidapemarek.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/27bd37779a6b83b688a39e58f15c818a/92223079476.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a40c22badac---68962264704.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/24755136523.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f0cd7cb83---kifetufamexituturomoxakam.pdfIn PDF document text
    • https://cet.sk/res/file/67394250960.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/20810775544.pdfIn PDF document text
    • http://takemehometomatoes.com/ckfinder/userfiles/files/79243028740.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/34295924612.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612d54d18dfca---karuzadizexowumopif.pdfIn PDF document text
    • http://614move.com/clients/4890/File/57386211227.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/sunuvokebojovidadilubeb.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/90440762441.pdfIn PDF document text
    • http://coffee33.ru/archive/file/30979686197.pdfIn PDF document text
    • http://funperm.ru/content/file/tutavebonezepetojune.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/54c7a03746503b9cf9ee325493bf6732/34869011218.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/5b860a18c3af2cb8526fab3f43d7bbb8/55058466410.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b619373162b---9305127338.pdfIn PDF document text
    • http://vinacafe-dalat.com/Images_upload/files/27927148925.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_off0000d3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DA 10904 bytes
SHA-256: 266785c22b9d08e00e7765cc281fc9e5dc1a4223a0ed0cb1a7cc6c704b8da901
font_01_sfnt_off0000ed33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED33 17100 bytes
SHA-256: ccbdb5116d1468ca7df9c6dab653086f002b848da000eb94078a2d4cf6393a4f
font_02_sfnt_off0001196c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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