Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4533f0bcbb1a19…

MALICIOUS

PDF

70.9 KB Created: 2021-09-29 00:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 53ff0f0a35bfeecdba048875b76f301b SHA-1: 79dcf82603b78fef8e1603452bf6df38be80b5fc SHA-256: cc4533f0bcbb1a19a8e2b8a2c3cafc502cf06c5858be0bae2ce4017b580b6adc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/847295085.pdf In PDF document text
    • https://ispartaprefabrik.com/ckfinder/upload/files/91830914142.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/15486832516.pdfIn PDF document text
    • http://bladensburg.abwingsmd.com/uploads/files/sujafowatigonuseburix.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/bemoredobobukaloxibebow.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/zepopubirawe.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/lowixiwalavuzokex.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/93623273700.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/10735054450.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/81679340225.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/5730338709.pdfIn PDF document text
    • https://pnvvr.ro/userfiles/file/56048333076.pdfIn PDF document text
    • http://runwellconsulting.eu/file/file/94385799167.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/13657674577.pdfIn PDF document text
    • http://badgerhillfarm.uk/wiwenakazuvewevunasukef.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/47097803045.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/noduzuvovarokeposu.pdfIn PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/38784567098.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/25015507114.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090207282873499.pdfIn PDF document text
    • https://chungcungoaigiao.vnpec.xyz/uploads/files/bijorarokawiv.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/77215356372.pdfIn PDF document text
    • http://dogwarts.ru/sites/default/files/file/maferixotexolobonuledove.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/xuromejosumi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=business+finance+book+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_off0000b3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EC 10756 bytes
SHA-256: 9851320f36680237a6837791842746fac8343eb23f95b76ded25e1847eef7a08
font_01_sfnt_off0000cc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC97 16296 bytes
SHA-256: e83aefd22f111a3b95702f57cad90112ee2f72ae79c66fadaabd7e11d77b3dd6
font_02_sfnt_off0000f5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.