Malicious PDF — malware analysis report

Static analysis result for SHA-256 002f5af0b76f42db…

MALICIOUS

PDF

79.3 KB Created: 2021-09-01 16:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: de428a917eb95d0ecf3d368954432f3d SHA-1: 4b6683e42c3b9bd497536a2e19f76856f77207a4 SHA-256: 002f5af0b76f42db73eb95237dcef56efeef23ebb691f0ce2caa1ba0d3ef3839
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous links to compromised WordPress upload storage, suggesting it's part of a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5443c0984---xizozunodamegujufufujig.pdf In PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ba83667f047---89386884135.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707bc893106---43195066480.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/sazojosudafunotexamezus.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/44773643275.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/5ae082c6a317e123ef80f1576f6e75f9/loxogefelimemi.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a18647fc0---duguxibi.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/jhijo3d2imediko1r9ds1thbtv/13293625378.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/lm5djts0pbd1qp95563oo06rm5/satonalufekuxumag.pdfIn PDF document text
    • http://modern-pro.ru/files/file/kodawederoxukasogepu.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/70114951078.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a820ca0b521---83608202063.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/19791952158.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/80293148665.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/wuzuwibejeled.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/2827a1bd4bbde2f746d2826c8b183fe2/19702652393.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c20ee850cc---sibixegitalomulez.pdfIn PDF document text
    • https://ducthai.vn/userfiles/file/milotalulirepew.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100bae6eca0d---vusexeju.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/xixuka.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/piie4d4sd7pb2tv4hsrtjobniv/rowezuvesimudubozurusar.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/67727056657.pdfIn PDF document text
    • http://gyorszol.hu/userfiles/file/sisixinuwowazavubejobib.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/557939a2e31e8505269bc855ac0e6914/suwuboxe.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/94558394701.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=hand+holding+phone+drawingPDF 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_off0000d590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD590 16616 bytes
SHA-256: a0b4452d7d036b4422edb50e92ae4f8c16a6365ccc6a20d5b976262dd852ed9e
font_01_sfnt_off0001003b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11852 10480 bytes
SHA-256: 79752ad3e0f1542d2e144eb11bfd6637582b8e3335e62ba9cb3903007c736002

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