Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e169d384bf454d0…

MALICIOUS

PDF

100.3 KB Created: 2021-09-04 20:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2a8c49036f6e46da1878d8438f23fc43 SHA-1: 4efed4d7296fbf3fcacde3239830048de56611c4 SHA-256: 6e169d384bf454d05dcee339d93536ac3dd7f59159a073a475391b9bbb88eca4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 6

  • 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.
  • 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://condicionamentofisico.com/arquivos/file/50915014317.pdf In PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f73e6ac6fd---lafoxesiluturupaxurugetok.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/14200068958.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/7fcd1153a173e22056f1d8e29d1e1248/5884208022.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/79631237713.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/085178721b8d5ba3c4d6dc24815d3fd4/wukoxor.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ed3029d1dd6dc85bf63722e773a5b01a/dogunufopududosimebo.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160812804acc4f---30203791070.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e829d224bf---38651773923.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/59185939431.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f61323391cf---xavigididakib.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/migizigajegat.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/52127717272.pdfIn PDF document text
    • http://araonline.hu/uploads/file/makudafalasanuroziso.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210511180630.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09ee6bbb19---nirunixizojigetagi.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/45230126743.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/cae27fb3dc5311163487ab927cf99a69/lisaremuzafobu.pdfIn PDF document text
    • https://soechi.com/userfiles/file/pibolade.pdfIn PDF document text
    • http://bouwbedrijfbouwheer.nl/userfiles/file/fanalabobenuk.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/33639619967.pdfIn PDF document text
    • http://inistor.com/ufiles/files/wadufabosinadexe.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/a515101b5b7a29124b68799fdce54b90/getimetoduritolib.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/moleketosarovol.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/upc2adsrge31pftgr203h9i7tm/gujofesakalorawuwazebovul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=kitab+khutbah+jumat+bahasa+arab+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10577 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_01_sfnt_off00010dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFD 26652 bytes
SHA-256: 5ed06f6ba2572d123b604ee0199167663d16eaeea975d88b132620051b8ea582
font_02_sfnt_off00015027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15027 10812 bytes
SHA-256: 00b0a464c3e46a5f24c1772a80fea3149b89b89134635b6cc40d474c2e457a92
font_03_sfnt_off000168d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1