Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7db147127a1276a…

MALICIOUS

PDF

80.3 KB Created: 2021-09-11 09:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b4bddb146c1a6c2ece40b54edfe6e72b SHA-1: 3a31585698af37d05146d5a073e418645bc8e593 SHA-256: c7db147127a1276aca0c81dab6c33953eb36b72e014e6cfac3b5a65179686733
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as malicious by ML classifiers and ClamAV. It also functions as a link farm, directing users to multiple external websites hosted on potentially compromised or disposable domains, suggesting an attempt to distribute malicious content or conduct phishing. The presence of embedded JavaScript indicates a potential for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kingbikeonline.com/images/upload/File/57358801504.pdf In PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/noxilim.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161380a97b26c7---mitatusalo.pdfIn PDF document text
    • http://tiyuchangdi.com/upload_files/files/20210908_095817.pdfIn PDF document text
    • http://jawarakreasi.com/file/77632528164.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/jerepusoxofesorepaterodax.pdfIn PDF document text
    • http://banquat.com/userfiles/files/33206438340.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133a551e133f---gamatizegowes.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/pixovokajalatebaselu.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/zibamodudazubuw.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/8376aced079c1c71c63df890004261a2/87626059418.pdfIn PDF document text
    • https://atrax.hr/files/34953823577.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/wekedajubawolaj.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/40701090549.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/fabukud.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/125403232.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/nazovukogofogudu.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///2441763739.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/baxivekojame.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/jamobalerasopox.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/wepewunibirexafex.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/tafixemerunopafipiv.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/u2tfdscf0e1k7bg30hb0jtpghk/maxenifubizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=final+fantasy+vi+apkPDF link annotation
    • 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_off0000d4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E1 18484 bytes
SHA-256: 7982a68c66e8dacf23a4e4775c710da9e08aa3663a2c7c99d38c14029a9a2583
font_01_sfnt_off000104c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDE 10248 bytes
SHA-256: d3c13680e01da054be87ce43fa1b2fc1b347b8f22e257959077b7c3dd40e32e8

Open this report in the interactive analyzer, or submit your own file for analysis.