Malicious PDF — malware analysis report

Static analysis result for SHA-256 974b1d4b8726716e…

MALICIOUS

PDF

96.1 KB Created: 2021-07-15 20:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73e9255bbab536fe1eff9696f3f80567 SHA-1: 514a77214073eb41777a40cdba1922c2e79e67e0 SHA-256: 974b1d4b8726716ed99367e574ec4f97a7fb3cbef0b706f5191b6da7c9be7628
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed to manipulate search results or host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://deitratech.com/userfiles/file/34120656992.pdf
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/52230626363.pdf
    • http://thoitrangvabaoho.com/Images_upload/files/14608534186.pdf
    • http://afgventuregroup.com/cfiles/file/82044010119.pdf
    • http://mazdooradda.com/userfiles/file/80136356964.pdf
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/34386718299.pdf
    • https://torgradio.ru/new/files/file/97149406688.pdf
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/podoluvorofarelivax.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/c60cf32b50219d105c860836f60490a5/doxeteliniximejes.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608eeb1d56e7f---58878967664.pdf
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/25251009334.pdf
    • https://shibbirs.com/media/files/wujifis.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/fcb3c17344c1d83ce093e70d345710e9/23491302610.pdf
    • http://cupta.org/userfiles/files/20210529113649.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a826568494f---36604215115.pdf
    • http://halongbaycruises.org/upload/files/xirapowowokikidasuwufi.pdf
    • http://dzbnf.com/upload/file///vifolus.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606c904c51ed0---61274678664.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c148ab1a31b---zidokokimaz.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/587271526b2a86b9f609aa86e00d481d/zofikoxeza.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7bf28c7f6---47340314636.pdf
    • http://crescentcarpets.com/userfiles/file/tarulovab.pdf
    • https://cabsfromheathrow.com/userfiles/file/2835860485.pdf
    • http://amctop.com/board_data/editor_img/file/202105181750.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=torchwick+and+neo
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011340.bin
a7a0c09fa0fd810ffa8051f86fb843231bb4fbbf71c81f2e51210d666afc69a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11340 18404 bytes
font_01_sfnt_off00014447.bin
aca98acf3e3a422088af9a9e1134a1a649b61fbf6211784f2903bc922b3fe259
pdf-font-stream PDF embedded font (sfnt) at offset 0x14447 10296 bytes
font_02_sfnt_off00015b73.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15B73 16792 bytes