Malicious PDF — malware analysis report

Static analysis result for SHA-256 08beb8ed81aca93a…

MALICIOUS

PDF

85.8 KB Created: 2021-09-15 23:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5c80b91484aff4538dd53522d7787161 SHA-1: 197128aa66d6c4d80b004819238831027b1f0158 SHA-256: 08beb8ed81aca93a8e5f3931708c290efdfbaf5cf8601075d45dd32be7b86190
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 https://pixomot.ru/uplcv?utm_term=find+my+switched+off+android+phone PDF link annotation
    • http://tipsclubcr.com/campannas/file/rivobasikedil.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/747jensrmg69js6a5m4ovca5jd/dekitezujaguk.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/57780344770.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373071ecc1f---79864629196.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/vuxisuwuse.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5148095a3---nexidufatemixile.pdfIn PDF document text
    • http://rotang.net/userfiles/file/xeruxitos.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/25776688188.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/mupetabapepuvopevofalir.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b980103435---zakozasalifawapusemevu.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/japelopesegumodunetu.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/76982080108.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/lifezugigejawaxoliseputap.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/59904822130.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/68569737112.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/7340319465.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/bonipufiliradopusanoxu.pdfIn PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/mosugujamavosunov.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/bagaf.pdfIn PDF document text
    • https://intersat.lv/files/file/zazozewizidufulomegesapof.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/e878b9050e3be5031d23b54374d5fe7f/37929728139.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/85963640728.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/xifiwavavunolumudove.pdfIn PDF document text
    • https://pellevah.com/upload/files/gitakujiwemabuxexobuxiti.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/laberavesatove.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/sizobesixopub.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_off0000e9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D0 17668 bytes
SHA-256: ff35384802789d71eeedaecc4a5c08cb5312c06ae1d632d9aff74d375967c541
font_02_sfnt_off00013009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13009 11016 bytes
SHA-256: 738fc7d5ce141b6cc29603f5ec5159b8e390e7255c7f7441482e9228b15b5f1a