Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a84733c42b78bae…

MALICIOUS

PDF

82.6 KB Created: 2021-09-03 23:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cc9fe2f90b73e4d681b689fc378f1706 SHA-1: 5994cbda45aead5cf0314357bc0922ea9ad90724 SHA-256: 0a84733c42b78baebc3205c1d674ae800722542e43f0e38730b0cc7c15f8b678
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely contains malicious content. It functions as a link farm, with numerous URLs pointing to various websites, some hosted on compromised CMS uploads. The primary purpose appears to be redirecting users to potentially harmful sites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://www.neocota.com/fckimages/file/razazitifewin.pdf In PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078902de759f---mowobosotovekajuju.pdfIn PDF document text
    • http://casaalu.com/luutru/files/tamipi.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc045f3138---76104312973.pdfIn PDF document text
    • https://davaocarrental.com/images/file/71616522109.pdfIn PDF document text
    • http://innotack.com/userfiles/files/rikuxatogotad.pdfIn PDF document text
    • https://medtek.vn/storage/file/palorukukeberid.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/73cbf87166a8b60875ea6bff7c843a9a/11646670964.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608718ce13343---feganagozabefewunidojetab.pdfIn PDF document text
    • https://ourguarantees.com/userfiles/file/kenopoxaxanifafevagikasi.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/av716sa2qjr7u79og245a1orve/wixeri.pdfIn PDF document text
    • http://adice-area.com/pictures/files/14164433589.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816733e0b4f---lazigebofagu.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084407a2f062---71080102774.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/15621856400.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/39115635231.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c72877e5a---zakudotax.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/29480a9bfbd56a2926051afc0de3245d/11728382535.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160fdd030bf600---titadanozunawugabexizafa.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/82673135649.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/najenezudixebitebobojuso.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c844944cc10378b07d50e598245ae83b/sutagisita.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/pinitozawibedunanuk.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/60f2bf35f8b4dc07973eb9709a6c0008/zozamilitugegapunaromi.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/vemagoxasenofom.pdfIn PDF document text
    • http://614move.com/clients/4890/File/vogejegunixadu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=catalogue+hafele+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_off0000d248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD248 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5A 22496 bytes
SHA-256: 0f9e35277c9cbf98d48498224bde21cfe3e854a2f7af4178442e66ece72954cf
font_02_sfnt_off00012556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12556 10444 bytes
SHA-256: 6553b786d8667f98b0d407974aa3e1fd2a425c2aeb5248b6e1f5e521427728b0

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