Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b8a50d88822af9…

MALICIOUS

PDF

76.2 KB Created: 2021-09-02 02:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 082851e68c80c0c844eca045794cd127 SHA-1: b706f2fd0882ea60f07d21ef44a872abd830e62e SHA-256: 59b8a50d88822af94191ecdbfaba7aec52182b29568022ee3c1cf2cc4ba07d7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=sextile+meaning+astrology
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/19114013322.pdf
    • http://co-wemart.com/careeruserfiles/file/20610167598.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/96ce4cps9vuuf6dpegren9a62j/tonitapubonusub.pdf
    • http://etenindex.nl/images/uploads/nukivagob.pdf
    • https://elitstroycraft.ru/source/file/67465969598.pdf
    • http://mrs724.ir/basefile/drtiketcom/files/gadedesipifajowomurawire.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/50913432148.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/176121c39158f5418c89e173eed88fb2/33955756796.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f2f85785da5---684944944.pdf
    • http://anatolianlgs.com/userfiles/file/75925418551.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f5e7d4b28e3---guvugukemineniladukutaw.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/0a97qf93070d5n6shl66f58dl1/71561366028.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/qbkadon7vjmr022bj8uhg1ru6e/jewumufelo.pdf
    • http://www.cerel.eu/images/wyswig_images/file/29824865232.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610f1f851dc31---43890641070.pdf
    • http://namjapizza.com/app/webroot/files/xadevogaxulazuxarijit.pdf
    • https://aspirans.com/files/file/92616392118.pdf
    • https://altonika.pro/files/fck/file/24529229603.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebc77b5bf2---25514388242.pdf
    • https://bomberosdenavarra.com/userfiles_nexo/files/92585385300.pdf
    • http://childconnect.com/swi/fckfiles/file/88412272494.pdf
    • https://szaniterplaza.hu/ckfinder/userfiles/files/35549226625.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9b67d15f1---nezewitu.pdf
    • http://xahscw.com/userfiles/file/zorolukapevoti.pdf
    • https://themis-lex.com/userfiles/files/48257562806.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DB 16792 bytes
font_01_sfnt_off0000deed.bin
897e18e418106896fbc48c6af17beeea5d56881888cc27801f465afac2dc450d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEED 16760 bytes
font_02_sfnt_off000109a2.bin
ba5eaf8ebd7bcc8848450b8bbf167765192e0705d38d70bad6c08a3b1750f0c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x109A2 10744 bytes