Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74452102ff0de74…

MALICIOUS

PDF

71.5 KB Created: 2021-09-30 21:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8dcd5b3f4a4a0541e6fa08fe0c8c43f4 SHA-1: 049ba080d727995e3a5707ab75a26c18c1f4c4b0 SHA-256: c74452102ff0de74829d85c40bbd5ad36959a1c4d5d88b129b774732dc3eabbf
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://pravkniga.ru/files/userfiles/files/kugogadun.pdf In PDF document text
    • http://pathtojanna.com/userfiles/files/rurejejenivokebim.pdfIn PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/rorasusutasiralek.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d6aad1fed0---9150384526.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16154105476550---wulixezesotunum.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/savozegozamudifaju.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bab18a6cb2---56086277956.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16141ec554bf13---98317273175.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/dovin.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/nalesobon.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/pakelirefeg.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/lizukazal.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/wufumozurimusijepupu.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/muvil.pdfIn PDF document text
    • http://food-cloud.com/home/food-cloud/www/site/site/data/files/refixuridovogarin.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/murofisa.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/ribifasanulug.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/22927237142.pdfIn PDF document text
    • http://dar-tom.pl/userfiles/file/97967748488.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/30396457492.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/ca97258c5f85326791d1067c199e6504/wamoxaparurepezobut.pdfIn PDF document text
    • http://www.juthamasclinic.com/upload/finder/files/manogitezanumetadiwake.pdfIn PDF document text
    • https://jgranit.pl/userfiles/file/53011953269.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/bidolekuludujomifila.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=outlook+forgot+email+passwordPDF 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_off0000b2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEA 17180 bytes
SHA-256: 22ac93c4ac4ca64ef8e9c21589b34698ccd1b4a71ce459f8229bf073a87e7678
font_02_sfnt_off0000f70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70B 11040 bytes
SHA-256: 72c96b864f5c00567113c2d812bec3e39349e106700a3601e061264f3006338b

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