Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e9d6bf0d7715b5…

MALICIOUS

PDF

85.7 KB Created: 2021-08-30 21:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 015b7aceecf7b63f792c2ad35ec83238 SHA-1: 731acaec3b53e5db822c658a31cdea553f7ec26f SHA-256: d6e9d6bf0d7715b5e539fb5e8b8334ebddf07e3f403627d5b8967756ca795b07
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly indicates the document's purpose is to trick users into believing there are changes to payment instructions, a common tactic in business email compromise schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://archism.ru/uplcv?utm_term=basic+accounting+system+pdf PDF link annotation
    • https://summit-christian-academy.net/scauserfiles/files/rugavupokulasakikijigoz.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78293547980.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/6af3ec39d9a2ac09f66d22c4420325a7/baxobosowavol.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160e3465d1458c---5061733891.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8fddeeb07---19386456877.pdfIn PDF document text
    • http://effektfilm.de/files/file/madajujowilidirazu.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/zifewokasuroneziwigov.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/kiwesuvobozaj.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/vesixepuvugelawovujudadag.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/bewojeninowolipivo.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609cebe050ddc---57180997291.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021062103101936.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6d1eb52e5---49640773494.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987d7be1308---telegukavexupenikoze.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de0e6313ca---lagewofiraru.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d63b10e7c4---84013681975.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/26733624480.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/95034199494.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/75508359227.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094757ea2136---79750911383.pdfIn PDF document text
    • http://cuacuonductudong.com/upload/files/43868437956.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/jefanosilezoxufufikazaso.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/bubekilutimawololizura.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/57e5f00168291fe410894a550833d171/33875973178.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_off0000e72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 11084 bytes
SHA-256: 7ac44c442265193dc97a0d0d1c0d92e3d8f13b2a11ee85acd563354bbc84a4c2
font_02_sfnt_off000118f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F8 18188 bytes
SHA-256: a084670cc4b24036846f511ebe5ae5ce0a9b42401f13454e464f9f3a7c131cb8

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