Malicious PDF — malware analysis report

Static analysis result for SHA-256 72415e6492a09e1f…

MALICIOUS

PDF

83.6 KB Created: 2021-09-11 16:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f77c173ccd265a2d871f6e50d175a278 SHA-1: 533ab12fe15e836ee4871be78dce9d8792fa90ef SHA-256: 72415e6492a09e1fb840137a4b640a663981656492ef4efed24e6df9c9ec9d4c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on suspicious domains and are flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://vietnam-intraco.com/webroot/img/files/83284174822.pdf In PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/17973634421.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/17832173408.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/gebazujukirif.pdfIn PDF document text
    • http://trunglamdecor.com/uploads/userfiles/file/joxoxilikulubutajete.pdfIn PDF document text
    • https://adikkedua.com/contents/files/sikesuxage.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/50732631896.pdfIn PDF document text
    • http://revtechnik.cz/userfiles/file/gijusakumexabifu.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/64cd086445c209b7a04b805f20747cf0/liseguxotorufesaxuduk.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/vozubo.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210905_082609.pdfIn PDF document text
    • http://yjeverspeed.com/userfiles/file/ruwedir.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/takubasejunomipeni.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/duboluzosetuzib.pdfIn PDF document text
    • https://allianztc.ro/files/file/5723731949.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/8940834052.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/8614874342.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/zifilonugez.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/rutufegidibifinunuvifir.pdfIn PDF document text
    • http://medrea.ru/upload/files/jolonefofepofokinoka.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/gesinurulum.pdfIn PDF document text
    • https://dnsbp.com/all4help/fckuserfiles/file/xononevupimetatevu.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/19934895198.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/13999311762.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/76975241369.pdfIn PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/wazekizusof.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e514e9d0b---65922396260.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=resident+evil+mobile+edition+mod+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_off0000e36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7C 17104 bytes
SHA-256: c0fd9ee63806fbfe4bf141e10b825ae3a7f2a6f907f355aeef4e3b44717685ac
font_02_sfnt_off000127d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D2 10796 bytes
SHA-256: b4e5e54d89e2939ac477cc22f648de80bb92b618e507565e548d5a23e1068746