Malicious PDF — malware analysis report

Static analysis result for SHA-256 361ef9a84284e9b9…

MALICIOUS

PDF

78.0 KB Created: 2021-09-03 06:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0e71740e7dc5a339187911080506b5f0 SHA-1: 6ad2bd23765a3b847ac43f6cb920a743d57c98f2 SHA-256: 361ef9a84284e9b986f8dbc648cbc30eede183bf2eb110fe618d98e040250a0f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be redirecting users to external sites, which is a common tactic for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://capital96.com/userfiles/file/kaketi.pdf In PDF document text
    • http://innotec-industrie.be/userfiles/file/tiluzo.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a91972ac33c---74975251231.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/dd29caa4097f8b1b31e980c2d1744503/nivel.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1608fe5ca62741---23339556317.pdfIn PDF document text
    • http://linza-market.ru/upload/files/bowefuwevapekivu.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41ca221151---56382854424.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/54281531b775ee60900d3758cb77caff/86591753304.pdfIn PDF document text
    • https://ckmandarin.com/uploads/xubaju.pdfIn PDF document text
    • http://cgemfoco.com.br/ckfinder/userfiles/files/17756046517.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/lolukuj.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/boxijazuxijilepofumeses.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/3503712673.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/0740759e92ace5d473d6370ecfe55132/70911452864.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/67814404042.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b93622526ed---gisofigururo.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/siker.pdfIn PDF document text
    • http://medrea.ru/upload/files/99241860701.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/fuxigurugokojusekapafan.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/e2554c26c07dc4b96485e9601ba4b478/durobukaxukebuxabov.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/ferelitibudimu.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072f48369bdb---18632666230.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/81402414971.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/wazosesijuxefumuwadazozuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=write+your+business+plan+book+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_off0000cd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD82 10928 bytes
SHA-256: 93279439a7104e5ec783bfd769c0298223712b7f525c2a046c4573ae57d0ef33
font_01_sfnt_off0000e6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C0 17316 bytes
SHA-256: 526c555a43c0177b37e5a2b1833361cf6875c799cd010a506d8bc127e47358cf
font_02_sfnt_off000112a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.