Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4f40c38a01e835…

MALICIOUS

PDF

76.8 KB Created: 2021-09-17 21:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b1f71c56238e7919fb8b850c3fdeb2e2 SHA-1: 9d8e4b32e536200b56961671d8753f8b1e9eebba SHA-256: 7d4f40c38a01e835f5c240aef59336f909dab4f6726c652d1dff32740aee6979
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm, suggesting a phishing or spamming operation. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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=golf+betting+games+for+3+players PDF link annotation
    • http://crosswaysrecruitment.com/userfiles/file/12379835051.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/31064761006.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/wosejugol.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210912190911356.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/mojasem.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/90312507560.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/239118946.pdfIn PDF document text
    • http://parkingparts.com/Upfiles/file/wepolagajoruxomo.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/ganadefofoxusaxo.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/juwekururutupedugofipoze.pdfIn PDF document text
    • https://badoza.net/userfiles/file/seset.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/maduranexowuni.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/wirakukog.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/50119763725.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210915_D790813C0F75D764.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/pulogimekikovigaganalawe.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/fiwexe.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/tiserosipu.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/girixojenenatunitug.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/gifofesirurexamedi.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161446820d9548---tofiziwaxazezori.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/15493219685.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/93057637026.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_off0000c61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61F 18336 bytes
SHA-256: 6a86c484bd4d724d56dbb654037a05e55e930cb2fa2bd3b3d3e8950692b75001
font_01_sfnt_off0000f3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEB 11164 bytes
SHA-256: bec059a97ffd3bc73314cebffec85132439d59b6f2a893232a9f1f66e9e0da7d

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