Malicious PDF — malware analysis report

Static analysis result for SHA-256 980ba2b26a66b62f…

MALICIOUS

PDF

81.6 KB Created: 2021-09-13 00:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 85e95e16592ba1717ea558637ac8a473 SHA-1: 9b412c6a6e7387e3c593447ca89eb3e3ce9b613f SHA-256: 980ba2b26a66b62f50dde573744ee37337b2611a86e9a177156eb086cbf13e82
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The primary URL, 'https://irlanc.ru/uplcv?utm_term=minecraft+beta+1.16+0.57+download', suggests a lure for popular software downloads. ML and ClamAV heuristics strongly indicate malicious intent, classifying it as phishing and a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://irlanc.ru/uplcv?utm_term=minecraft+beta+1.16+0.57+download PDF link annotation
    • http://stellarp.com/userfiles/files/11074898613.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/57753216526.pdfIn PDF document text
    • http://midel.me/userfiles/file/xekowegixufalobuvazemaduf.pdfIn PDF document text
    • http://smirna.pl/files/file/gojewefutokanarul.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/lazetozabolaredurixiliru.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/lezisev.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/sujige.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/34183002081.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/nixodawanu.pdfIn PDF document text
    • http://beiks.info/public/file/52533655387.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/74574702436.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/40605678225.pdfIn PDF document text
    • https://proetcontra.hu/userfiles/file/femekupudomaguviliz.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/lewavojimumixexogusutabu.pdfIn PDF document text
    • https://tuinvandecruys.be/file/23869680219.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380c3d98096---navokedokoxor.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/79388358918.pdfIn PDF document text
    • http://kantipursecurity.com/userfiles/file/funibo.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/belijutasogineviki.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/27307028808.pdfIn PDF document text
    • http://shbaicun.com/userfiles/file/2021091305053673499.pdfIn PDF document text
    • https://isosklo.cz/uploads/56324240455.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/fobabetizasubewivikop.pdfIn PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/fadisinidezuxusiwiw.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_off0000d931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD931 11112 bytes
SHA-256: cc2f5f7f882b1971ad18afbc7c3222a6d37436c36bd699bee8adfd75b5e6ceff
font_01_sfnt_off0000f369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF369 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7B 17324 bytes
SHA-256: f6f0e42283037fd065b1855aa33da958d75935bef2441d0852290afcf84f4460

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