Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8bc5123d42f222…

MALICIOUS

PDF

70.1 KB Created: 2021-09-17 21:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d25e6858c250b26c506296bbc4e64863 SHA-1: 7d8fdd03d7cf0d24f01e209d60a1c778812c3d6d SHA-256: bb8bc5123d42f222852f80c51f38b4a4fd1d924b9faf39ba60218e95f2d37f67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142ee7078f2e---27389232084.pdf In PDF document text
    • http://babyshelter.net/assets/upload/files/21501389211.pdfIn PDF document text
    • https://webkapper.nl/ckfinder/userfiles/files/raxuxewudaxojofaponasadof.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/donami.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/ronimobabebuterizedu.pdfIn PDF document text
    • http://rcsiprojectracker.com/userfiles/files/xojakiduvojanusupi.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613287a78ddc5---48026349391.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/ccba8649aeac798e5897b039594a5b03/giporozenutomolewe.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/gajetulevalamadawenozuzi.pdfIn PDF document text
    • https://0900107678.com/upload/file/fuzunimivemu.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/0d8cd01f03e14c10f4ea0acf5aaf1574/durunawebuwise.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/seluwivefoleteti.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/7ejef775or56dnp0m92e67si33/89419157719.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/3gf6ujf3ee652oslksleqhaoud/menevonewugev.pdfIn PDF document text
    • http://capri.lt/userfiles/files/rukesizikifir.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/32196041099.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/63584529294.pdfIn PDF document text
    • https://krossi.ru/images/content/files/42491576780.pdfIn PDF document text
    • http://www.enfersalus.com/ckfinder/userfiles/files/sujenibadevatosez.pdfIn PDF document text
    • https://ksdc.in/userfiles/file/telijaturugesujifovunul.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/rupafexajobaluminuwizese.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/rinepodaromojigetakesafa.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613276096eeb3---pisodutinebet.pdfIn PDF document text
    • https://bczenekar.hu/files/file/6294063390.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=kode+cheat+gta+3PDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/bepotujevusabujo.pdfIn PDF document text
    • 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_off0000b72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB72A 10304 bytes
SHA-256: 2e1bb2c0fa1c96645230e58406c6e3bec7124eb75acbd7c3ffb4b44e3fa9f209
font_01_sfnt_off0000ce56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE56 14472 bytes
SHA-256: f097244f3e0e1e3f354f4f551a20b859d85b2bf2ebaa0228b83e102176765012
font_02_sfnt_off0000f2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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