Malicious PDF — malware analysis report

Static analysis result for SHA-256 274c21ef6c01a08d…

MALICIOUS

PDF

99.7 KB Created: 2021-09-05 15:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 29e994268c77df2f4c641312feb455d5 SHA-1: c803def6e9f70c254ea45b3667dec713bf2e161f SHA-256: 274c21ef6c01a08da0b08d077658b69c313a6a51a297875d9c6be42efbf7d14a
204 Risk Score

Malware Insights

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

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a payment redirection lure. It contains numerous links to external PDFs hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content or phishing sites. The document body, though heavily obfuscated, is associated with invoice and payment language, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

Heuristics 8

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99cdef084---bisologas.pdf In PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/62255514160.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/ed7157d913b3d76ed1a82408009db54c/24923086257.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607452e86c4b2---64604295229.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d2dab4789bd---83332987538.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/20218311057177216.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/47137417666.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/dunikowiwaru.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c60fde454f---72990647831.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/92603673782.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/71109348762.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/joronojebawiwotonebonaw.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079dec287807---puvolosukikukuzik.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/veram.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/lanurexe.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/mozezutiso.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908b4d5c294---gakomewegadumuraxa.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1e72f2258---83842190842.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160719ead07220---wufozutipedoso.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/cstik24e8k3pq0qk5c8b3ksgd2/davimolide.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/72149486647.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b50b9b13bdf---54706481056.pdfIn PDF document text
    • https://hoalavender.net/upload/files/nunawu.pdfIn PDF document text
    • http://artospace.com/pics/file/pejuzinolilutovipa.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7e99e7209---dovasikufefuvutez.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/40800112155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=divorce+property+settlement+agreement+pdfPDF 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_off00011eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB3 18724 bytes
SHA-256: 421dcae61be620cd031f784ab33ea3b8caba8d0781f9e847cc0885567f3c0021
font_01_sfnt_off00014e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001669e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1669E 11144 bytes
SHA-256: 7ac0ac0a16fa178e6f5462d2117490f1bc179c0436583d0f30778f029d081284

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