Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f893ff64338ba8…

MALICIOUS

PDF

119.1 KB Created: 2021-06-27 11:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 1fc591b223800237600dfc26c7495925 SHA-1: 46d749c3da09753aa4b180ffec53758b2f29c32a SHA-256: 26f893ff64338ba8aeb36f4d187e09de72c576fa1f2d269f47226e093f31a80d
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is unreadable, but the presence of a link farm on disposable hosting and compromised CMS uploads suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9690

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://scriptdd.com/_file/file/zawawevilojobovitizapikem.pdf In PDF document text
    • http://artkulinaria.pl/sites/default/files/file/zimadizagufi.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715f9e318bf---40223388580.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/0e78af8b889b86946c73acaa2e2ca503/45398389306.pdfIn PDF document text
    • http://nhs1966reunion.com/clients/1/1c/1ca8f1639ee69cd7806809ed3bcda9bb/File/50954243515.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/jitikenewon.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608154e0b74c0---40073873807.pdfIn PDF document text
    • https://deepankarbasu.com/FCKeditor/file/39907251450.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746e0c82474---20517575562.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071bbe2360d8---demal.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/xitasukewen.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/wudinodemeko.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/geqao7v16jdoc6pghkvvudbku7/mobipilofuf.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/pezuwato.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a68a921ac1e---29661167243.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074ad68587d8---77324742426.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/sitobemepekebutogenaf.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/63342409686.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/97769511311.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/86dlhrs7908huqvhnh3j0njtau/29442497749.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/5jidedtd7n1425rhl23rubetr7/24839996056.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/14829544032.pdfIn PDF document text
    • https://morabia.fi/images/file/62045898101.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=fate%27s+decree+meaning+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
stream_005_off00018017.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18017 28972 bytes
SHA-256: 2943edca4cac95066525cbdbaac7d1d359a010abf11fc8034b94681e66122ba3
font_00_sfnt_off00010bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC1 30580 bytes
SHA-256: 55a0135a8190f31757e0f85134dceaf398f988558d4328e120dc6d07fbce0327
font_01_sfnt_off00015187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15187 6660 bytes
SHA-256: 43ce9ad8f91571a745bc5abc16cc5a450ed49bc693b4082124a66baa0b80bd5e
font_02_sfnt_off00016806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16806 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001b5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5EF 10708 bytes
SHA-256: 2e76f0f2c489f055075e87c5e2b69b20c40e5eb36949ed089db535bf73e91765

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