Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e80e1675018f31a…

MALICIOUS

PDF

95.6 KB Created: 2021-07-17 08:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b239976d7ba9a450608436748abadfd5 SHA-1: f47a09f0c59fda06571e72b0c7553101f65f4fa2 SHA-256: 1e80e1675018f31ac5b0a01e0eada7c3c94de2efa09db4f563ee33aad2ec07c7
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple disposable hosting domains, many of which are compromised WordPress uploads, suggesting an attempt to distribute malicious content or conduct phishing. The embedded URLs and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

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://pechati-piter.ru/userfiles/file/4454771463.pdf In PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/1abbdd686a58a402b9eae03ff5f05f40/fovusevarakolov.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f15c8c796d---nizesew.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8d60088e2---wuxupusosomokiwajupi.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/3bs3asjpqas8u61k1q9unfepbm/guporoniveg.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/28765285969.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/ee6arj7k0dif0thb8go8imeca3/28679930503.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/wipufafajalamigukuruvuj.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61e8e3d857---tuturatuxafova.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609185f417b56---98954111079.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/funimekizagoxakexa.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/euhru6t4npnpiumkhl6gnnh074/65480431337.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad947b20a28---30702363662.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/ronapesomebikap.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/dg81mehv5pntouqdmop8mdpo3o/wafulexamigokozogokotaxi.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bdc6688901---fezudakim.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5551145e1---nikedubu.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afa4a97ac6---46412444837.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/dokemuledutazilelej.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086556125da7---bepizip.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/37140387771.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725e3b048b7---27773028561.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608927e6f3dbf---60494340066.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/mivimobugojugovoxorud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=meaning+of+teetotaler+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE793 17456 bytes
SHA-256: 25f062add0a9378b1fb1f03eed6a6dcb501ce41e1d4f4bd4036e6516b4dd1c48
font_01_sfnt_off00010226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10226 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A38 19552 bytes
SHA-256: ac5b34c01c10db7d1fdf7a44abf40955c95399cbe19f5dd02d6203b6d744c33b
font_03_sfnt_off00014a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A97 2836 bytes
SHA-256: c1275df508866e3d39084478a2cab0165237f940201268d9dcc796794d98b815
font_04_sfnt_off0001566b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1566B 10484 bytes
SHA-256: 197f2027844d9b0355195442bc31a43c4c4b5a0c5bb99462ffe5298d85ee696d

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