Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f92104fd0d72fe4…

MALICIOUS

PDF

87.4 KB Created: 2021-06-26 04:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 79dc04d7f61b1ecebbbb38a9356113b8 SHA-1: df96b5453db688303f41aa551dd98a7df01a7e69 SHA-256: 6f92104fd0d72fe4f458ecf58a41c9de362713cf33dd12853617f93c81f7cc56
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a browser extension or update, a common social-engineering tactic. The document also contains numerous links to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/860jte3n0ub40ioqtvsis1u545/83661940068.pdf
    • http://altelaw.com/uploads/image/file/zuvezitor.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb343a8b3f---taxefazapoto.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16078c37716586---zuvodudogubozetarupejuna.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac852a657a---tefutimadevanen.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160ab58dc6dcb1---dedulolitodufeboduj.pdf
    • https://kovosluzba-praha.cz/res/file/bikip.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/cq4kv6ne0o3r69khdn2cl2s7t6/47351127782.pdf
    • https://ildiko-szepsegszalon.hu/userfiles/file/66570893466.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edd8fca26b---siwedobuvolokekigitub.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7153483430---2334479158.pdf
    • http://banghaija.com/userfiles/file/gapulanawigesaliker.pdf
    • https://bobecoingatlan.com/uploads/editor/file/simafivupo.pdf
    • https://mn-lawfirm.com/box/userfiles/file/tidisatalujos.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d586458816---tebodazi.pdf
    • http://immopolignano.lu/images/wazekoromifanenatulus.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160895c19f1b81---fonote.pdf
    • https://pointvirgule.ca/upload/editor/file/17772722216.pdf
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/ef527aa3cac6e2899426c572051d0a58/mekefelujujutugenozopesu.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/e3d853dea1168a38b7557b10e08533c7/zawakedanel.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fc202fcc8---dunovatikosedozo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=google+extensions+store
    • 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_off0000f349.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF349 16792 bytes
font_01_sfnt_off00010b5b.bin
6dc8acdb42b1797dcaf5a16c4bae1d2d944a42aff2e5b96077aa63a71f5aa4d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5B 17576 bytes
font_02_sfnt_off00013986.bin
53741bd585425e034bc13f5502c30af18c573e7faa20834389e29fbc87be8b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13986 10260 bytes

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