Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2fac1df3c09b2a…

MALICIOUS

PDF

75.3 KB Created: 2021-09-15 10:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 19340991d43021686d9b8d5ffdc2b27c SHA-1: 80f2c9f6902685f5edb7855dba930ec20f1281c6 SHA-256: 0a2fac1df3c09b2aec8a5e17e9f30b9d667c6546e35a7b8397223946a1a44720
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the nature of the heuristics indicate the PDF's primary function is to lead users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://dogathermalhotel.com/resimler/files/tamuzalijusozulejasojuv.pdf In PDF document text
    • http://terremeraude.com/userfiles/file/jifexorovuz.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/gekadarobabimumuxa.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/3128823433.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/94138674833.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138725608803---defibarakarugowowasorozow.pdfIn PDF document text
    • http://ustunongel.com/image/files/66650519734.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/61312611425.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16141187938147---bobunifakovolawu.pdfIn PDF document text
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nanexe.pdfIn PDF document text
    • http://ydyb.com/filespath/files/20210911132107.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/zixuxudinazutitawizilinir.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e67954892c---92996559281.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/xezitugarafutuzinedoj.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/poqcvqah6mp8jo3ldvpadp7bl2/45774353815.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/18720166210.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613056daed6c9---likolibijariru.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a578831f4---rilukomosufemajeke.pdfIn PDF document text
    • http://www.kigimex.com.vn/ckfinder/userfiles/files/jinotivaxirojale.pdfIn PDF document text
    • http://cyclad.org/UserFiles/file/xajijufidewup.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/31479423619.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/warebenivawin.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1631246183.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/kujadikagupiwezumu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=death+of+ivan+ilyich+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_off0000c095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC095 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A7 18296 bytes
SHA-256: c5967bb5c803b6b7d24e018a1f9bf505b9776438e21e23e3180b9cc37171b225
font_02_sfnt_off000107c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C5 10628 bytes
SHA-256: 0d4a03056099082cf064c57f36f767997748986f23758d5d7b800f63d3c30090

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