Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c10583fb780c96…

MALICIOUS

PDF

85.1 KB Created: 2021-06-26 04:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a00e03af17436ce1a7c4d87cfa500b29 SHA-1: fb5a4067ec2dd258e9c466ccc8191ade3539f22c SHA-256: 32c10583fb780c96202118b9295dce29ab4b6a56d8e0db02153784dedfcd5f3f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, suggesting a phishing or redirection scheme. The presence of multiple links on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a737bd30b85---46070673399.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2ad2cbf3---mipitowonitaniza.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01220b9eb3---pudesomire.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/fupkt51ioikhm0mjj57mj2s7b3/todivoje.pdf
    • http://mistral-paints.cz/userfiles/files/nimojuwoteduxi.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be8726545ae---99020033053.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/99081323730.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160c2acab19595---wubeso.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/d7c682c7dfeb342c8daed1d436538832/somad.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/ae472ed2b3e333bbe68461bb660f0390/boxug.pdf
    • https://luyenthitoeic.info/userfiles/file/tozisogusuk.pdf
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/milv4dp5c5m59n8kap5ev6v5k8/45613039425.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b556e403117---98336601692.pdf
    • http://bluekeydigital.com/images/pic/file/gavaretomomaz.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/0095033e6bc80c4207a86b066db7789d/15218684303.pdf
    • http://skiflogistics.ru/userfiles/file/85526358065.pdf
    • http://aarogyamedico.com/userfiles/file/98659201266.pdf
    • http://orderleesushi.com/uploads/files/21369315890.pdf
    • https://gregor-biffiger.ch/userfiles/file/69349050032.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/0869e5096cd609d8a6ffd83d98bc48a1/84882235744.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160739f93bf1bc---36277824406.pdf
    • https://autoprofi.ua/userfiles/file/zekavezifojun.pdf
    • http://adria-ex.com/images/blog//file/fodovupu.pdf
    • http://dambi.pl/userfiles/file/68707793972.pdf
    • http://teraval.cz/res/file/20616208992.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/05s5pf6bco0dmpmng2dbhdrf4f/lumodozibogogevafubenuvin.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=blessed+assurance+piano+sheet+music+pdf
    • 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_off0000e8eb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EB 16792 bytes
font_01_sfnt_off000100fd.bin
a59616ea0cb713f26fcfd1c7e563fb8da9ad825c51f22c9e36cd5ae26defe7ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x100FD 17044 bytes
font_02_sfnt_off00012d78.bin
7ee38e2c7ca6f67975de93c79344beb4ce93186d5e35f2f42d09b8ef0964b7a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D78 11036 bytes