Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee94ffb72b5cf00…

MALICIOUS

PDF

85.0 KB Created: 2021-09-21 13:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 04e7b8d6ad68be452e229ae04789f365 SHA-1: 4155fadecec02cda7ac73d98748a04ac7b34e0f8 SHA-256: 8ee94ffb72b5cf00d6d37727ecc891ab1af998ddcbc94c9ce010b91f1da38988
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of numerous external URIs, many of which are part of link farms on disposable hosting, strongly suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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://laborke.ru/uplcv?utm_term=occult+america+pdf PDF link annotation
    • http://1careglobal.com/upload/files/lutukij.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/vowakikimajakaxugubozuz.pdfIn PDF document text
    • https://manpowernepal.net/ckfinder/userfiles/files/sebenimuta.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/59692313864.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318bd544a57---51662586873.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///feremizok.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/72167870517.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/zibek.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614024963b3ff---45310750645.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/vuziwilitideguwopevid.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/74470505772.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/40226367270.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/denofotonogupidob.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/93644854175.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/zapobazuj.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/kevobodufaxume.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/62685315409.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/bozitufiguwezunubezabe.pdfIn PDF document text
    • https://carolinevlieghe.fr/images/file/nuzexorugotafeworawijis.pdfIn PDF document text
    • http://btfa.tw/upload/files/48663528895.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/raviwapevisevimefew.pdfIn PDF document text
    • http://zima.italie-ubytovani.cz/data/file/zitubeda.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_off0000e874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE874 18052 bytes
SHA-256: 8688adcb5ee522f510c87ca69594a8d02c56d6b5325af41840fef563ce3c2b6b
font_01_sfnt_off000116b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED0 10512 bytes
SHA-256: 24ec58e7e1d12e068ce5e65552fbc52bf4fe0143bc8aca01218f143746d99f69

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