Malicious PDF — malware analysis report

Static analysis result for SHA-256 8542bf204e808309…

MALICIOUS

PDF

80.0 KB Created: 2021-08-18 12:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a9c77a99e5222ff4e229bdcdcd4ad988 SHA-1: ff9db7bfd58377e59e43f3b1c7fb8e43d541ae5a SHA-256: 8542bf204e8083094ee9cc519268b85d677211dd31335c65a318dee305064cc5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8421

Heuristics 5

  • 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
  • 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://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/29sc5fb23m7aq0kar4nu7cul56/dobivevokurutolug.pdf In PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ss3jb6l1afjfrv7fc7u28t38e0/gisapebogo.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/0bmo3vvhar4b8kl4gmksg1v3h6/13629144061.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097088dd45d7---nesipuje.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bce742c5f42---laziz.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eae3488998---vujibujetujab.pdfIn PDF document text
    • http://veno2.com/upload/69703972750.pdfIn PDF document text
    • https://truonggiangcompany.com/userfiles/file/kilejenuzavokedel.pdfIn PDF document text
    • http://amdind.com/userfiles/file/60616113377.pdfIn PDF document text
    • http://prociweb.hu/sites/files/file/lopiz.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607096a24b31a---36415684043.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce0d5a026a---36012306083.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/m6l0ih6tm43j14323791pl78kn/megamedinuti.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/disarozegaz.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/52152703682.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/bubatitumobafiwufizedabor.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/19845177888.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/49141428153.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e690e3f0f17---sipivatetaku.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/tevanebizusax.pdfIn PDF document text
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/lufibepirorarixoxata.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-7-22/20210722135244666153.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5a742606427a66a71c9bbd4c9508c48a/97771283560.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d64816f29---nigalufafasudikak.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/11945947481.pdfIn PDF document text
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/vubofozexujikun.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef09f0cf79---87806761411.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+make+woolworths+kebabsPDF link annotation
    • 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_off0000e544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE544 17460 bytes
SHA-256: c31f88db8354e0f2cdc5d170b7f632374cf1078322d745ee5ae28cc08abebca2
font_01_sfnt_off000112d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE9 10484 bytes
SHA-256: c5dff66b7d18983e3c8cee27a2ec1ef54956cc28976bb80b28ab08a21e43debe

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