Malicious PDF — malware analysis report

Static analysis result for SHA-256 7217c0f7b1ea1b7b…

MALICIOUS

PDF

84.7 KB Created: 2021-07-01 13:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf79e487edbf8cfb28fad73187ad2983 SHA-1: e2eef476220f6c4df6001f6e778c53c58477a66e SHA-256: 7217c0f7b1ea1b7b09d0233baae303d8b1451bb9a9cec675bef176056ae68871
196 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, with several URLs pointing to compromised WordPress sites and potentially disposable hosting, suggesting an attempt to distribute further malicious content. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's content is designed to trick users into believing there are changes to payment instructions, a common tactic in business email compromise attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdffd092001---zunaz.pdf In PDF document text
    • http://lyjclinic.com/ckupload/files/7115783614.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/demim.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/47683710355.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/ratenalatemolofateli.pdfIn PDF document text
    • http://secretinvitation.net/images/files/wajujurewagexozufiwovam.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089add57b3e4---jozam.pdfIn PDF document text
    • http://3sdent.com/upload/files/21274847998.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/59f8afcjbmem7bh2jdhm8rpp7k/65515595361.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/cb9aef2bfbba868a39c297d54497dc7c/21174966413.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/76442757101.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/14759543351.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3e48171b0---35968058571.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160be82f7d9bbe---luzuwenig.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb22e4046e---8677094595.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/54645404310.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e89e4942b---73689522142.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1d624465e120234b28ca7b2d7e2d0954/16710527159.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/284kior73nd3bgrsnvinp4nrm9/41655373328.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/b8b4df44281308b7c934d6ae3a02e756/70210496324.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/zikajizer.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/mubedivebate.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/32653998743.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=all+50+cent+moviesPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e82f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE82F 16792 bytes
font_01_sfnt_off00010046.bin
a7ad3cc0d638610f54041318cea4c7c6daa2c9d49a8b87496acb5f2a6160d494		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 10432 bytes
font_02_sfnt_off000117fd.bin
2267db6d9b1ff804a5b761ec35aec64c1c8760fb17521c628e5ebacaaeca7672		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117FD 17568 bytes

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