Malicious PDF — malware analysis report

Static analysis result for SHA-256 696f71e9bf420ed0…

MALICIOUS

PDF

86.8 KB Created: 2021-06-27 13:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e8685f06b136833f69fed50334681779 SHA-1: ff6a78f5aafa72de0458d8e41f7cdf64fea41dd8 SHA-256: 696f71e9bf420ed067e788d6dbd9e32190abc60cad97b3b474391a9274ad6e5f
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains multiple links to potentially compromised websites and uses lures to trick users into enabling content or providing passwords for archives, which are common tactics for delivering second-stage malware. The embedded URLs and link farms suggest an attempt to host or distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://gazosilikatnn.ru/uploads/files/bavatedanarulatesigubu.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc7135728a---bapekanix.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/bclbnhi5t8iut55touujm17ken/zevexabes.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd9fe87e15---39922630592.pdf
    • http://azizolace.cz/images/file/malejazezejolonigib.pdf
    • http://szyldkj.com/luodan/images/userfiles/file/85940555611.pdf
    • http://ixtvs.de/_upload_bilder/_filemanager/file/95782493805.pdf
    • https://nsck-cykelmotion.dk/userfiles/file/fanatibivopa.pdf
    • http://bamila.vn/luutru/files/30682094897.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/5316e4d282ccb9f89ebac41ea869a614/botixilupu.pdf
    • http://capitaloffice.pl/fotki/file/12895145701.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c8520fdd57e---37996286548.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/cabbb11a82c666f6cc0ad9ff1573b106/tabekiwo.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3879d1d06---pafokumotedu.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087edc204f61---xofisutovuvaruzus.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba3f96d4bc---48417915711.pdf
    • http://salt17.com/userfiles/files/dexoregavinoxujiwuza.pdf
    • https://newtech-utm.pl/userfiles/file/gunara.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8d1dv70fs5pms6g6hp1vpq8qm/jetakawixim.pdf
    • https://xn--nmqu14inmf.com/upload/files/soxirezoroseparipon.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079931258ce4---zamukuneze.pdf
    • https://nationalshield-uae.com/userfiles/files/37914115023.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/b6852da2e4ee6f8f94d287e61e221f54/81476499271.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160987a2bc7cc7---dasulisakomosala.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7f788d286---sexafuzibeb.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/bgs5del5hh6avv0q7tstee7bvi/69282449032.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=permission+settings+prevent+word+from+printing+this+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_off0000ee9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 16792 bytes
font_01_sfnt_off000106b0.bin
65f3d4c062f8f20ee3a55a46a07ec866a8a847cf51bd84cf777b23c0d6fa49a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x106B0 16804 bytes
font_02_sfnt_off00013252.bin
a3f7ab004809717dce28ec04cf88bbb3e307eff3a6784bf1dfa585c5bf814014
pdf-font-stream PDF embedded font (sfnt) at offset 0x13252 10892 bytes