Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa73c3a2b23c0da5…

MALICIOUS

PDF

87.2 KB Created: 2021-06-28 06:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 24298c9575b4697bb5acbebbc88fb5b6 SHA-1: 455563a9e26b5f19d6429bb17d64a7f6a8fcf2e0 SHA-256: fa73c3a2b23c0da55a0d35c9d503a266f9fff303a244afb8785f6adad98d05dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or malware distribution lure. It functions as a link farm, with numerous embedded URLs pointing to other PDFs hosted on compromised websites. The primary purpose appears to be redirecting users to malicious content, likely to facilitate further infection or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/cc39dea64fda60c2590483e13a3db95f/xopuvefebamunud.pdf In PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a81eca273---situkibelumepiwabesaru.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/7kpui1sc759nc376420mgqk0r4/panurojopafifadobebezosaw.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7c98c1dc3---munujivejubadaxomo.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/a26ad5dd2f114f3518afc66ca7f80771/65139660472.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/q8qearteqp0soqdlebnl0k1ies/pijesazelirar.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/koxetebi.pdfIn PDF document text
    • http://axwelindia.com/uploads/70734033693.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/4b3ab2761bcbbc4732bf8cceb8046abe/28356361723.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af8fe8d645f---10496731370.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/jijinejowofepoda.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160806a2b49c13---89870027814.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/bital.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/u6og12n4c6fci5jgepgeurig21/zotomewunokodewaso.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/c8d748212b4fb5ccf24962a008e8351b/xidijufepatos.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/i5dsbve0m66aisg7dqrn7t7mid/tosiwidefomiduvemenos.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/aee60a238aadeb41e2f5229016022f82/muzezel.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4eeecbfb48---mukowu.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/272214067.pdfIn PDF document text
    • http://graham1978.com/clients/79565/File/11265951530.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/18069879723.pdfIn PDF document text
    • http://bomtvplus.com/data/board/file/20210521145722.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=meaning+in+farsiPDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE584 19972 bytes
SHA-256: d1c7314d6b76db68869159790a5fd3431dffeb1a148165f3c7350f3830ab3ca5
font_02_sfnt_off00010664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10664 10116 bytes
SHA-256: a9d5a35d99d2c6dbb71fc4274ca325a2c68c239ba44ec831da11ad286b0aade9
font_03_sfnt_off00011d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D03 18836 bytes
SHA-256: 7e083357ae6e2ff47b5f2c57d8cef1f768b2f8380a6f8949a719cba62fbb83e7

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