Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6344c689013b88…

MALICIOUS

PDF

89.4 KB Created: 2021-06-26 03:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5547f78b3a1c5c15cf3820eac375eece SHA-1: 6494733cd04dd3d8362d155ade92a8f42a8b97a1 SHA-256: 6c6344c689013b885ce94681a76d8030e5f8bd29d038cabfa449dc320f24e4ee
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malware or phish credentials. The presence of a visual download button further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://teraval.cz/res/file/papeb.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dab43c9051---92331995486.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ibhbl32naobk00cbhc443fb7g7/92402933399.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c41f72d9163---kuvijumovopanetijagib.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/9288a4cc3341db975f9babbece7661c7/jajemavopukekavu.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbcd274184---33853104930.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a344c11c64a---14006828024.pdf
    • http://buergerforum-tirol.at/file/52092899743.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160832755215ee---73959837389.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e914184e9a---dukagagexizivunidumav.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/cu37ftsfjtomv2i3rtdis2kj1i/44005586636.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607153fff1fbf---vozopofipojenu.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/2e5f58f4f2a0b2e7379158339adb555b/xesugujisalom.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f4c48d0a3---23653967114.pdf
    • https://advance-pack.com/editor_upload/file/41464988153.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/ceacb6bb8b8468fe9644637319b5d9bd/tunisusorosapi.pdf
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/8a3a3065d3b6b4b994607c437288d28e/95387258510.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771eb8e1685---59131752305.pdf
    • http://bidmitt.com/img/files/file/48393047229.pdf
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15524213542.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/44201f47825a4c8ca690685696e7ced0/minozisakapobinudovu.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/15b21b35f0c644e0a6dfbd9f2e0c9d42/zaxizilafakebuvonig.pdf
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/159875de9ced18d2ad79cbab8d2f8008/61183792012.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ede0ab75d---nagojonazidi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=2021+general+knowledge+questions+and+answers+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_off0000f806.bin
2ec42d1db1cf82e1c3be2c5f1aea99642e7b5e10c601a9dfe56d720db6d47f86
pdf-font-stream PDF embedded font (sfnt) at offset 0xF806 17552 bytes
font_01_sfnt_off000125b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125B9 16792 bytes
font_02_sfnt_off00013dd0.bin
1468d413a95f6b07428c88d0b81f7237c5d49bb36b434778272ecf2a597f5923
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD0 11296 bytes