Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32334a38ffb4107…

MALICIOUS

PDF

82.9 KB Created: 2021-09-20 16:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: edb1d72b9659999cf6bd995aa5f3dee1 SHA-1: a8587497b5a72bc3820722f58fb42dfc4aebcf69 SHA-256: c32334a38ffb410731649182abfb32c8532f04845e5387f606189a8e6468249e
134 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed to obscure the true destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to trick users into downloading malware via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=365+days+full+movie+english+subtitles+watch+online+free+123movies PDF link annotation
    • http://camel-republic.com/media/userfiles/files/pufijoxiwiju.pdfIn PDF document text
    • http://trinitysportsandleisure.ie/userfiles/file/sofoguk.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/6284989922.pdfIn PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/5615140114.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/74626966995.pdfIn PDF document text
    • http://serting.eu/userfiles/files/piruzixativabotosukesedop.pdfIn PDF document text
    • http://computerdoki.hu/user/file/wozafanimonuzupasoku.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/wigalovesipukuxogimofiv.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/otez.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/7203028830.pdfIn PDF document text
    • http://zjleiou.com/images/upload/File/lebebajogorerex.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/9hkjeq94n5js9du8ejai3bmb16/lezufafisesenaruromiwur.pdfIn PDF document text
    • http://xaydunghoangthanh.com/img_duhoc/files/62074086602.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/mufexo.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/tefomusorijixeg.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/75960448355.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/meragulevamij.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/fofadaloxexipuviwo.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/80746914323.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/keliwitira.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/mozizipinuboziwo.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/bodepotawoluboraf.pdfIn PDF document text
    • http://pooq-design.com/app/webroot/fckfiles/file/wugilotometuna.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/jewisiximiw.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161304e8a43f1f---rojusajixoretavitidul.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_off0000d94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94E 11976 bytes
SHA-256: 46ec14d1609c3397c02108669d5d2bbdd18d23c5b6d8e887a67559b420f01512
font_01_sfnt_off0000f5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DC 18344 bytes
SHA-256: 2f16c101e47b44424698e168b70304666e2d4b9c3d304206bc758114f8ea167f
font_02_sfnt_off00012564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12564 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1