Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24e9e8854cf5296…

MALICIOUS

PDF

99.7 KB Created: 2021-06-14 00:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1e7603987f3ec9859b35a90b3154536f SHA-1: 79f4a5671721ad12400652ff6c8fb8ce167a2b87 SHA-256: a24e9e8854cf52967be16a3272ac058647dc585ac80ec95b2c7e443fadc77c6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nomylo.ru/uplcv?utm_term=vijay+tv+raja+rani+serial PDF link annotation
    • http://bawaconstructions.com/editorData/file/voferekiwava.pdfIn PDF document text
    • https://unosms.us/userfiles/file/bapetemetigisegagujufef.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c671c999a7b---xosubirudodivoxurejimemif.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707bb768857---jajiwetaridiku.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d35a466491---diletuxazipab.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/34e4e5dc810a172a79d3f427175a0768/5203381465.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/53788634893.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/eskpmc7cg3uk1o0cl2s3f2p295/zigozibogizoba.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d671b4d29---vobomemazeselataw.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a12c8a6bb---tomurowenulabafiki.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/3n45vk5d5mlmttnjgnkkjrd6j4/68327337730.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/caaaac2ea1306498edd16816b900f4d4/93846062756.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e18399829f---xofegofadojoxug.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/7d312acaeb359732998e007d6e29d3f7/75979666076.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/qih6cmjprf1emv1gq1qdjch9s6/74684571763.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001101d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1101D 14160 bytes
SHA-256: c7b6c0be5fe098cb1656d493ac3422091409965542b0e7423ad8ff70dda74de3
font_00_sfnt_off00010098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10098 4560 bytes
SHA-256: 562013a4733ccbd6d01ba89937a9219a9d01a0d7cbd8fbabc7afcaa5ee1fe6d8
font_02_sfnt_off0001324c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324C 2640 bytes
SHA-256: 58504a9a503cfba40941c0d2fab05dda1368e91c6dda13cefe751516e6733994
font_03_sfnt_off00013ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDC 3776 bytes
SHA-256: 003b0bd7eb85c67b3abcb89fe6a24b953a0e5df03c9d9bb9708fd522f9d83c4f
font_04_sfnt_off00014cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB5 11104 bytes
SHA-256: 7e9abad4235ba1bbedd49251d6cb9f261cc580e5f12e5d143e37f01863e2997a
font_05_sfnt_off00017295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17295 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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