Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e94e9cba593355…

MALICIOUS

PDF

92.1 KB Created: 2021-07-06 20:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 139b3af63d9f6269731ad7185a62367e SHA-1: cfdcd50ba82d75e05a2d7b03852cddfb7bede953 SHA-256: 67e94e9cba5933551db2a5d398d12ea303ebfa1c83d16048e2e424eec54a82f3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the intent is to trick users into changing payment details or initiating fraudulent transactions. No scripts were extracted, but the presence of numerous external URLs and the specific lure pattern are sufficient indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://smidgel.ru/uplcv?utm_term=what+time+does+current+bank+direct+deposit+hit PDF link annotation
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16078334896981---99187715487.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/96f14e3066eba57e6719101876f4695f/44311252059.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/0221c64efd1515f9beab285ff8f81390/4908411439.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afb6e5d8d1d---rixinexibujudelox.pdfIn PDF document text
    • http://consade.com/userfiles/file/40770999265.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b26ff96f5b---xafag.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/vufawodatev.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607293ee41f13---siduzelepupolura.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/2845d6513b1f78324640ae5bf50ee88c/36704655110.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/4586520a5ea6d0c45a507a8e6af2fa2d/favavigamimatonaze.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/kotovagef.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb358c33fe---79420326737.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/lm9fm5s61fjp84n7sbb35ac738/26684233376.pdfIn PDF document text
    • https://eternalbliss.net/file/59397087920.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/kcamh9mp36gkh1clajsg5kt832/vudiza.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608a533f722b8---3473974859.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/zodunif.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3f680c4bb---56817340472.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/it87jto819nauu0j0gd75bg4c0/mexuvafimar.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68774ed015---bipogeruzifugavewag.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5764af1a---begusekoj.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/girepabumef.pdfIn PDF document text
    • http://dmscsmartlifeblog.com/userfiles/files/kedosurisawabajaxibituza.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/392c03bf0e103c8320b6df70706861e2/90566884711.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/8f032c22fa741af041b1dd781efc1f71/xixawakeparotaduganat.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d9e188f1f---pulibokani.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_off0001029b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029B 17676 bytes
SHA-256: 70d9816f2ea4dfe143f531d4aed3b90415b28bff8393e2f261dc527f6a0e7d4a
font_01_sfnt_off00013138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13138 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001494f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1494F 11056 bytes
SHA-256: 6bf029588b03eb904c31af38d694e7f4b7e4dff158ea7778074988767163e9a4

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