Malicious PDF — malware analysis report

Static analysis result for SHA-256 2892e8403a2c59d6…

MALICIOUS

PDF

89.1 KB Created: 2021-07-23 09:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5e39014cd923dd82896f1ae8a758c6d5 SHA-1: a308c907a18d94f4489237258b5cd706d981f48d SHA-256: 2892e8403a2c59d609f4fcedb0d916577525d445c12649c20d768d7453af32b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://cokhibaosang.com/media/ftp/file/genemabaxedujorevibetoxu.pdf In PDF document text
    • http://msnladyboy.com/ckfinder/userfiles/files/96711561645.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/rovuzurasalivorodu.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/kf3iafqt4n9kp6qos211i9pal6/98651307465.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/45153530551.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/861ed8b8315e9c98c05bf4bbe222bac2/50761315208.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/bubamap.pdfIn PDF document text
    • https://signika.pl/Upload/file/kewuxavamifupikumibinepe.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/957aec7d6b06b93c9cb6000c6a747810/32546040684.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/livepuso.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/70915136584.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b7e9c322---soxekuxuwakinuda.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d896b2f14---98796306511.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/d0efc6c5ae9b771b8687059e4ba42fdf/52365816712.pdfIn PDF document text
    • http://thebellingerfamily.com/clients/0/05/05034faaa501c69409a7459485cba135/File/10392502641.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/sosasotaku.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d89af19d3---85963659293.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/tulomaluwufoze.pdfIn PDF document text
    • http://hasyo.net/files/file/59632506351.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/r36ni0no9an5ase7c6c168bnnv/68945886485.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b90e78c1b0---gowujober.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/91532630439.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+cast+phone+to+mi+boxPDF 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

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_off0000f5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EB 18000 bytes
SHA-256: 3a9bebd92c8f5d8d3a9eb852d66656c6f4e8d619319cc6d28f182cd2985594c5
font_01_sfnt_off000124ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EC 10812 bytes
SHA-256: be52b8a16f87be65da1bc77b9b7f9e0e950f894ba57513cccf49754e30590024
font_02_sfnt_off00013d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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