Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff8b7caea4a420d…

MALICIOUS

PDF

89.3 KB Created: 2021-09-07 14:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fa8ee263002635ab9b5b2c5b64bd9454 SHA-1: 47a5606b2a5aafc74bf688c59ca2609c890316f2 SHA-256: dff8b7caea4a420dcc48c29b6bff635c5851925077eae6f1b1dcc20fdf0cc8f5
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many hosted on compromised CMS uploads, designed to redirect users to external sites. The primary lure appears to be related to "mercedes dtc codes pdf", suggesting a phishing or scam attempt to trick users into visiting potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pistant.ru/uplcv?utm_term=mercedes+dtc+codes+pdf PDF link annotation
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/57cte8m1aqgfmuciouo2tf6620/66058077683.pdfIn PDF document text
    • http://scsytech.com/upload/files/namifalilijaxeturidikegu.pdfIn PDF document text
    • http://0851gay.org/userfiles/202106file/2021062018484270554.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/68464726589.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/fuwesozaxagilemubi.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/bevunitus.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/33574242613.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fbf9befe6c1dcfa04e1455fed47ff412/fodosetarozo.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/c76e71f80c0ef1440827a1715b363f49/fufurimenakiwa.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/zakuneduvojasanup.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090396c27568---55467578799.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/gokopamabi.pdfIn PDF document text
    • http://womensmentalhealthmd.com/clients/9/9a/9a9ccad1be43d50cbc9928f06550b956/File/62397689162.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/0638ed99ce25fd4906fc0b641a9656c8/33743902126.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/faba98ddaa775705774fcbce78c840c0/dujuxexemi.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d18e2ced5---vajapafibiwazogupep.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9138a39847---73365159439.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/94296126654.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/35939594406.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fcced7880---44349006696.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/2jq9icro4lk362nf9dp2e1tt23/7034174201.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/85a50df1bc8fe2ec6febfcd428686d54/90721671766.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/65967730309.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/18822080300.pdfIn PDF document text
    • 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_off0000fd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD12 17048 bytes
SHA-256: 5d4e96da34f5d37e277d5d8e6c74d3e8ca29909770ffc6498691779e77a511c0
font_01_sfnt_off000128ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FF 10204 bytes
SHA-256: b8ffb950fe2ce7cfe080f5564f9511127360fd2b0e3e2ca0048cd8daeb6140c3
font_02_sfnt_off00013ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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