Malicious PDF — malware analysis report

Static analysis result for SHA-256 c575fc873228ca74…

MALICIOUS

PDF

86.1 KB Created: 2021-09-20 00:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ebfcf1c4badf9168267adf859de97725 SHA-1: a4de0b6994740c98c1c25f68fd5de4200b121b00 SHA-256: c575fc873228ca74a07bd870a96814018442994e5e0ad9295948af8e1caf2236
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable hosting, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://allytemp.ru/uplcv?utm_term=moto+g8+price+in+bangladesh PDF link annotation
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161413e8a42398---88929028240.pdfPDF link annotation
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/46549189516.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/15650180656142f90d9b6ba.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/89467331691.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/1032286160.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/72359192505.pdfIn PDF document text
    • http://sklenicky-obchod.cz/web/admin/fckeditor/userfiles/file/nusonikufisinatebufuvini.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/15701791678.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/5983574490.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/28781340318.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/jisewatapaxipejatuxis.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/depezo.pdfIn PDF document text
    • https://tkbhanna.com/ckfinder/userfiles/files/9836181086.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/92256334937.pdfIn PDF document text
    • http://desiaussies.com/ckeditor/uploads/files/22584873227.pdfIn PDF document text
    • http://divorcefinance.nl/uploads/file/19693917403.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/70082151440.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_off0000eaa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 11132 bytes
SHA-256: 36280249f695f1bcad8bd823e1aa055ae731417ee3c6f07e21323b0612a79e49
font_02_sfnt_off00011c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C41 17980 bytes
SHA-256: 2ca8a5a491901097c84def3fe1dbecbea2f1f4d54575a4b3529f18c05e93302b

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