Malicious PDF — malware analysis report

Static analysis result for SHA-256 7317962c270aebbb…

MALICIOUS

PDF

76.3 KB Created: 2021-09-20 02:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a8446e732e7318f08e6b5cceed70e6f2 SHA-1: 92c2272e425477209c1c2f2957252f4d52974fb5 SHA-256: 7317962c270aebbbe33ef2647da469cb0cfb021d5086970ae7a4c6f19ded4013
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also includes numerous external URIs, many of which point to suspicious domains and appear to be part of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161322a700ccbd---fewuliwazapa.pdf In PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161471200674e3---xufumugodezezazozas.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/bufusebosirevefopawoju.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/penajivuxudinixavawelof.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/99031025215.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/jawasikanov.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/70335064764.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/vutusuxotuwut.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/xitogakiro.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/bapukoko.pdfIn PDF document text
    • https://purefeeling8.com/data/file/44598106515.pdfIn PDF document text
    • http://punaide.com/userfiles/files/viwebatuxinexewimasixip.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/zonufedop.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/53285508447.pdfIn PDF document text
    • http://terezszilvia.com/images/uploaded/file/xezakarinifi.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/2318065335.pdfIn PDF document text
    • http://shopcloud.cloud/ckfinder/userfiles/files/sijanenujalo.pdfIn PDF document text
    • https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/sukatejasawefudawipus.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58430573447.pdfIn PDF document text
    • http://melvin.cz/data/26563740488.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/xipipijusofezesuzo.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/geginemedekuvexes.pdfIn PDF document text
    • https://safe-international.com/userfiles/file/bibigaguravoda.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/powibewetipapodona.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=gta+3+iii+apkPDF 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_off0000c9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CB 17140 bytes
SHA-256: 3f90ca5c047b5d370d3b463d75028c67a47406d9bfda0af0d0b7868b9111f61c
font_02_sfnt_off00010dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCB 9876 bytes
SHA-256: 808f6883705dbf961eee2146039ea4fe6f353501f4eb68fb7741145f022c59df