Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca99ff70af7fa761…

MALICIOUS

PDF

81.7 KB Created: 2021-09-09 05:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3afafe0686f1251b06631b3642cb3a1a SHA-1: 46cba4337a9fba7812a844a00b43ee310a232bef SHA-256: ca99ff70af7fa761f4b35c888db298cbb53c32a598485fea0f623c66936cae3e
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yuc-fac.com/uploadfiles/20210904085052.pdf In PDF document text
    • http://mebelhotel.ru/images/news/file/90384175324.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/74559975259.pdfIn PDF document text
    • https://gazeta-msp.pl/user_files/File/3573206516.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/mirakewegidijimudoj.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/41650696679.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/54618244542.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/39208818016.pdfIn PDF document text
    • http://tornyanggrace.com/upload/file/57472099563.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161349f8d22f56---69010468635.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/50178026575.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/67265205990.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/sepuxol.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/94048422376.pdfIn PDF document text
    • https://grouptm2.com/contents/files/wurevorevezimorul.pdfIn PDF document text
    • http://lienming-rubber.com/uploads/files/202109031624128764.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/44582014625.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/9201079860.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/rinogelitagovuparob.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/13459445356137128e2e25f.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/firawanikopevokowawif.pdfIn PDF document text
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/31276553696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=loki+watch+online+123moviesPDF 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_off0000d9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F0 17844 bytes
SHA-256: a2c420458324f46377f91c8731d6b725c4073f06c16e17bd23c09e0767d48645
font_01_sfnt_off00010810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10810 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12027 10940 bytes
SHA-256: f633ced3e2a4a74e7626ddae8a8fe9a09810fb31502514550462a3706d80871f

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