Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0078923ef20805…

MALICIOUS

PDF

81.0 KB Created: 2021-09-14 08:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cee8815f50cb7a47448a0adeb3579bf7 SHA-1: 514d1ea1dc7e91b0105de5518070eee5197c905e SHA-256: fb0078923ef20805751ce3c0c4e1f4e48467e681a54e8aec91995e3ebcc4992a
196 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, with heuristics indicating it is a payment redirection lure. The document body is unreadable, but the presence of numerous links to potentially compromised websites suggests a phishing attempt to redirect users to malicious content. The primary attack pattern involves tricking users into clicking links that lead to credential harvesting or financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://kryotherapie.net/neu/userfiles/file/68082995624.pdf In PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/10407026354.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/wotimurogu.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/sudinugeza.pdfIn PDF document text
    • http://vedepcuaem.com/luutru/files/34433776970.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc612c3592---lidokulajubudesulediwowi.pdfIn PDF document text
    • http://elpijisystem.com/file/jenivuvetazoravuvu.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/renuwe.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe74f36c81---kiwatufimisuzanab.pdfIn PDF document text
    • https://szpital-sulecin.pl/images/fckfiles/file/68878679535.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/62838385375.pdfIn PDF document text
    • http://status.cz/UserFiles/File/34316611020.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/95778754357.pdfIn PDF document text
    • http://cybernet-ap.com/UserFiles/File/donepamepawamodalojofese.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16131ad735f4ea---41225081963.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/40918636831.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/vidinobofeg.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/pitigefoli.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/kubosevuxadevipatudubefa.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613781f619303---78387124685.pdfIn PDF document text
    • http://naim.naparts.com/images/fck/file/litalase.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=is+there+a+way+to+transfer+contacts+from+android+to+iphonePDF 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_off0000d858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD858 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06F 10988 bytes
SHA-256: 8cabe4a3ef4f5bc23ff7dc744a0f0a7016411167282732e22a7e555d37c7147b
font_02_sfnt_off000109de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DE 17080 bytes
SHA-256: 9eeef04794cbe8587cb317f0a9c2713a26b9f8ab3e23c4fcc23848d7cdfa3cb6

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