Malicious PDF — malware analysis report

Static analysis result for SHA-256 9668ea3c66ba5120…

MALICIOUS

PDF

84.9 KB Created: 2021-09-18 01:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 761f0c05484766ce691d63d98f8849b2 SHA-1: 888a42ee3c4ec42fc3872eda542ee84808679cf2 SHA-256: 9668ea3c66ba51202116ba9d44da38e5974a8e9bfc72fb5bd13b1931a19f6811
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest this is a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://pistant.ru/uplcv?utm_term=gta+san+andreas+1.07+apk+obb PDF link annotation
    • http://conblocmanado.com/pics/file/tewemefowoduzuza.pdfIn PDF document text
    • http://ferien-in-zahren.de/images/file/xonawatenelozugaridomux.pdfIn PDF document text
    • http://secretinvitation.net/images/files/wolixiraxe.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/74703311721.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/91131002477.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/76882510380.pdfIn PDF document text
    • https://apatity.verlauf-ekb.ru/admin/ckfinder/userfiles/files/71121308195.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/2eb429c2059cbf1358eb513870a83089/xusoragulas.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/80554220789.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/vugagogojixerazemunu.pdfIn PDF document text
    • http://denetimmusavirlik.com/userfiles/file/vobatomulux.pdfIn PDF document text
    • https://haidangpc.com/contents/files/mafonuteletapetid.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/47627166218.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161316d4fe32a5---lotulasosig.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/jolan.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/25213197747.pdfIn PDF document text
    • http://tolaniprojects.com/userfiles/file/90229077225.pdfIn PDF document text
    • http://clerus.hu/files/file/40120236900.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/81106461390.pdfIn PDF document text
    • https://jocafoto.com/fotos/file/sisoreserajuruvejufas.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/jujegugufojazusibirofu.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/nazipedutifetozi.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/subikemoj.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/40073288328.pdfIn PDF document text
    • https://primer-spb.ru/files/files/vexixagesazonorolesod.pdfIn PDF document text
    • http://n3ss.ro/ckfinder/userfiles/files/xizejeduvesafipowosew.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_off0000e670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE670 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE82 18008 bytes
SHA-256: 84d4c99055f4433489e48b1fa890704115cc819966ea1b1ed4d1810e5864ffc5
font_02_sfnt_off00012ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE2 10808 bytes
SHA-256: ed091d627cac7791a1507090484b00cc9689fb42ce50cbc0664f76c4c471f6c9