Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82cd60246ca3041…

MALICIOUS

PDF

80.1 KB Created: 2021-09-20 03:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 77a108fa6c590f1efb2c024793dd5763 SHA-1: 530e3ba628f668a290e71a6343200be123c7dd85 SHA-256: f82cd60246ca3041c2d0dec93fe7531325dceb4b0521231fc0cbea82066920ec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution attempt. The PDF's structure and embedded URLs indicate it's likely used as a lure to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://huntic.ru/uplcv?utm_term=mha+season+5+episode+4 PDF link annotation
    • http://addisonplaza.abwingsmd.com/uploads/files/88788616726.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/12583804551.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name/files/nagosomotenadirugazux.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/27676223399.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/87687025894.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/zukuzawimuvorusam.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/bf61f9b103942b0293f4c33e05694b21/76012405002.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210914144535.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/tarorufuf.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/68721346076.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/jemipoxarosenunivuzur.pdfIn PDF document text
    • http://jianianhuayule.a9188.com/upload_files/art_files/files/20210908_000146.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/lozotulugumofox.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/susevafametujenasolud.pdfIn PDF document text
    • http://w-mill.jp/images/file/wowobuzoselavosigudub.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/96276243513.pdfIn PDF document text
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/75475120271.pdfIn PDF document text
    • http://abnicum.ru/files/file/93299602417.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/nujofaluzoju.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/nugegegapevemegumi.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/puvemumobuwadajafikajoke.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/xoxebadurubunemuse.pdfIn PDF document text
    • https://suacuachuyennghiep.com/uploads/files/nozuvuladegaz.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_off0000d4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 18404 bytes
SHA-256: db753c1c43266d93efc92465a42b1cb6e211eafead4db27a381a6fd9e33464e9
font_02_sfnt_off00011b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B86 10452 bytes
SHA-256: 1c4b02c63880cbf991d4736a898fb0b5837bd1c87d26fa80db9614c30141be26

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