Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7608106d849ed47…

MALICIOUS

PDF

83.7 KB Created: 2021-09-18 12:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 01ad3700025cfe93607d578e745af642 SHA-1: 453caa70bb39759f1b134c6b7a46015710e54044 SHA-256: b7608106d849ed478af401f10289296442e524cff8d29031c9124cffce044835
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one specifically mentioning 'install modded google play store lucky patcher', suggesting a lure for potentially unwanted or malicious software. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=install+modded+google+play+store+lucky+patcher PDF link annotation
    • http://annassteen.com/ckfinder/userfiles/files/12377773779.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/62190452776.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/96635525341.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa60718049---sanop.pdfIn PDF document text
    • http://highdesertrent.com/newsite/images/uploads/file/64019812353.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/xevirokajudugomifipusikof.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/vinilunobe.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/10748276012.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/46662231489.pdfIn PDF document text
    • https://transmilenio.net/datamont/userfiles/file/wuwumobewirowupu.pdfIn PDF document text
    • http://gomsuhoangminh.com/app/webroot/uploads/files/75108629512.pdfIn PDF document text
    • https://msiutilities.net/documents/pinuzivufuwitojimelotefa.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/faviro.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/fesomibunalegipal.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/48023ffb2cb634b7ceab7285fba7f144/67463939991.pdfIn PDF document text
    • http://wangnatheater.bpi.ac.th/ckfinder/userfiles/files/pobamebikoneweteli.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/pezeperolani.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021090808034334.pdfIn PDF document text
    • http://e-menu.hu/editor_up/82737406180.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/50428752699.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/milubogowo.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/xobim.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/butaxugagakefuxuweluzurom.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/tofexitu.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/tokedewuvi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40E 11128 bytes
SHA-256: 19ecfe122bc81fc87afebb10b54977a7de623f301f6f3e6f6132596dd6241d10
font_01_sfnt_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BF 20660 bytes
SHA-256: 8a5e132308a88aa711633d0d7be01a3ad06956ef6b39e1af76d46c5cfc4c265b
font_03_sfnt_off00012ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE2 16164 bytes
SHA-256: a29b536ab701e0f3a4d03943dd56dd4ec8b8c0d8b29b8e28b2448b9bd76a7e77