Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d66d4c58bb0e669…

MALICIOUS

PDF

108.9 KB Created: 2021-06-28 11:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4d794533e39e2b9b9f12b40357614cba SHA-1: f60d9739093dd375acebe6d4a2ed7eeefb6c7d61 SHA-256: 7d66d4c58bb0e669907fac7b2fdcf149cec493ca4f2a6da50a124e0a1fd28bf5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit users through deceptive links, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1a6aa6e5e---54655333112.pdf In PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/fdee1d0ad6a267755819e235f942fc01/48818400325.pdfIn PDF document text
    • http://midel.me/userfiles/file/lemijatefusuro.pdfIn PDF document text
    • http://accronline.com/userfiles/file/texuf.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/95a3460fe007f30d0d06f2bb42db22e1/domefaxelalefikim.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/juzipakaxuzewisosa.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/0b5742d6682be3cf065c126e2c2e01f4/20677111546.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/403f9c3e4fb745cf309f344029776088/zusejosokugubi.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e543ed8cf---63935075072.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b028339f0---44604199764.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/18392872355.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/0cd755d8760e496fd675ecd5a3434af4/83964363289.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/lodifasesupapawitif.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/28291707653.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/pbkokgld01svg9kjehtuo47l44/37034893291.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/bgu0a235tab54p7noaqnnqagj7/vexogo.pdfIn PDF document text
    • https://aedwea.com/upload/foto/55629983022.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/5bb99a6ddf684ac88d32ce74d64c6663/40909856904.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/vrljc3oe8k5r839u01bnfinrc4/68012028294.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/a034b58690523094d03f2a9b68e7250a/15111891555.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/7737450194.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706615cd3a4---80953276431.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/38847841614.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/8416143622.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/6b05c10c107f2ca58e52ff562c50aacc/51634035327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=extraction+of+essential+oils+present+in+cardamom+pdfPDF 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_off0001472c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1472C 17420 bytes
SHA-256: d62618b857c781ce8c6f5ad1ce6a7d3546d38f3117c945e739af5b3960c97693
font_01_sfnt_off000174cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174CF 10868 bytes
SHA-256: 74a0af901095132dafe37df57e8a6ae532eea26c76346ac42ff85a3ee4459857
font_02_sfnt_off00018dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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