Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6150801fd43e404…

MALICIOUS

PDF

72.3 KB Created: 2021-09-18 19:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8b30a2d893d5fafdf3eb4764be3f96f4 SHA-1: 0a9fe866351069816ce765984845f5d2bcddc944 SHA-256: e6150801fd43e4045b5eda9081b3c7a4a472578c83e5f35e24124b7db1ba5d6c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and external URIs, indicating a malicious intent to redirect users to potentially harmful content. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan PDF. The presence of a URL pointing to an 'installer' further supports the lure of downloading malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://wastran.ru/uplcv?utm_term=installer+youtube+sur+android PDF link annotation
    • http://irinaburmistrova.ru/files/sesozalone.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/nilizorugavovedifonoz.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613586bb2c937---59940888562.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/48728598086.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/9336687517.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161384b10708a5---61588398737.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/navopaloze.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/82279153988.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/gesesifajov.pdfIn PDF document text
    • https://nycsmindia.org/ckfinder/userfiles/files/wokarebulojewu.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/85203452378.pdfIn PDF document text
    • https://cahayamimpi1.com/contents/files/3880244224.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/19899900329.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/pilajozorovoforuzokami.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/dedonotidujixeverima.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/pojukefufidisisegave.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/75168175271.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/25380248660.pdfIn PDF document text
    • https://ppntassone.it/dati/upload/file/94487620518.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/67486176610.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/10111028795.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/18018609754.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/taguruwokatofemivakarugat.pdfIn PDF document text
    • https://sharks-cz.cz/images/file/ruxiwuzamazeg.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_off0000b97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB97D 16396 bytes
SHA-256: 80609b220865c3f84dceb64777e7cdb0abd2ae6e41d5f044fcdbeb44963fa251
font_01_sfnt_off0000e372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE372 10548 bytes
SHA-256: 37840eeb8ff907282ef7b4d08e90f906273b144cc4bc95d6618ed979a06e309d
font_02_sfnt_off0000fba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1