Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be3b6ebef3f6ae8…

MALICIOUS

PDF

81.7 KB Created: 2021-09-15 09:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 97b217f67f4980b42e4c54a09b783e54 SHA-1: b47fd91e5f2e4d50bcf5b38759f88f4d538c99cb SHA-256: 7be3b6ebef3f6ae812f4a9ef780ff038bb87741e73f817b89bca93049974f264
164 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including links to compromised WordPress uploads and link farms on disposable hosting, suggests a phishing or malware distribution scheme. The heuristic for a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/uplcv?utm_term=fnaf+no+download PDF link annotation
    • http://ktcyy.com/ckfinder/userfiles/files/45638887832.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/75317359498.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/52370147584.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/10589550193.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/toladorikamurepiwizaxula.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/vefeniruzutosatiridakep.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/82632988317.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/73765547723.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/rvarhjiesp4cdte0krk94qbflpa8stvm/titaf.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412bcb0c5d4---48936959202.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/35173097294.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/fukipikeno.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/f3388cef255554d7040192259384a38b/gugopotokelojobuxutatix.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/71115955236.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/budewuziwufonawaru.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210911_E5A40A13A35AF84F.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/mopotiwawelivanu.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/10456154565.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/21464778116.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/pexugolejeginok.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/66920326759.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/f252d2f4a91c4db96cc6851b24143284/8346640674.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/10201485825.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/mijuxamugujajewul.pdfIn PDF document text
    • 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_off0000dd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52D 17904 bytes
SHA-256: c7e38d0a44896f43f2eb36de3edb5f7c2164e5e2ee476662f7dc44c477143ed6
font_02_sfnt_off000123b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B3 9820 bytes
SHA-256: 68e55ba8c0f2407a636f84857f2b3021aa2d5eb14f030e66964cc3e26616b1b8

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