Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29bdefc5a6d8c18…

MALICIOUS

PDF

91.9 KB Created: 2021-07-14 04:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0db906a6d4da0349d5609306a5ed7810 SHA-1: 3ff767677f8a3896314bc7a1a9353004026e911b SHA-256: d29bdefc5a6d8c18df9c1cf4708d5904d13294713ca576de6e3c737925eac30a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external websites, some of which are hosted on compromised CMS platforms or disposable domains. The embedded URLs suggest an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=things+to+do+in+emsworth PDF link annotation
    • https://rajatotogroup4.com/contents//files/kemipikubojabi.pdfIn PDF document text
    • http://thebranchoflife.org/clients/3/37/37a84c4c47f147f839b5d5a44bb1b86c/File/53950492769.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/xutasalo.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/50662948908.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/th0erh6p8vckdipk9iej8ar46t/miveloravegiw.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc869b6c61---budelawobazo.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/42640199ecd9ae5066bac754d3488b69/wozudoruseravod.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dcd503e83---zopuvemejufubotavabika.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/75485897361.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/eaaef57963186ae071e92d778806bc63/80516665700.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/jivaxosonewasen.pdfIn PDF document text
    • https://ka-base.no/images_content/file/jovoxojojanemutu.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/n20l3qt3ij95vf89e3a930n32s/gavubuzexidawarike.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607071d7d102b---38955394440.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b234ae71d---lojopetezelatul.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/352140d135614fadde9155177fdfa19c/wosakosorafokoj.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089ea44d1e35---92547768841.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/52641505744.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf1656164de---99067902713.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607151927b662---31457969504.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/3herdu03sr6dj6fk7nvqv9jt8n/61466703856.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/gatewetosenisufe.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/76335468890.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5F 17188 bytes
SHA-256: 7549c817b3c7783fdf3ca7558c29ad134ebba83a0910bd6559f0799b72baeaf1
font_01_sfnt_off00011b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B02 16260 bytes
SHA-256: 9e97cabf11d8fb0b6514a3a57ede6ef43af79b01016493608a1ea3d8f3bda74c
font_02_sfnt_off00013085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13085 10536 bytes
SHA-256: ac7b4facd5e213a2d01d7ea9e31eb055d4b73abdad7ef163aff2cd7ce9ba8408
font_03_sfnt_off0001482c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1482C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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