Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bedb947bf194412…

MALICIOUS

PDF

86.9 KB Created: 2021-09-16 08:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: cc82e0d2f04605086fa10882a8435909 SHA-1: 72e6286b7fad1fbc50739a72db993d9da458ebc7 SHA-256: 1bedb947bf1944121bf36fc7e0fe588f5b0a92c242250b7254443c2988c0da26
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. The PDF utilizes a link farm strategy, embedding numerous URLs that redirect to various PDF files hosted on different domains. The primary URL, 'https://huntic.ru/uplcv?utm_term=random+cvv+number', suggests a potential phishing or scam attempt, possibly related to obtaining sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • 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 https://huntic.ru/uplcv?utm_term=random+cvv+number PDF link annotation
    • http://duepassidalcentro.it/userfiles/files/sukovosapizofiruja.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/fasekuduxizumujerewifole.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/jusewegupekusagezuki.pdfIn PDF document text
    • http://www.ecrivains-consult.fr/easyonline/ckfinder/userfiles/files/74096665980.pdfIn PDF document text
    • http://armanetti.com/images/21405617791.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/fumewum.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/67393436768.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/15210572340.pdfIn PDF document text
    • http://reichspfarrer.sk/file/14186984288.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6f3ecc9c9638626be2d1a86c3f639019/wexuvikuzuwatatinudoge.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/84406151076.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/28493402607.pdfIn PDF document text
    • http://www.first-classlogistics.com/image/upload/File/48712503561.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/41388557548.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/pufopubirivodujadomuvati.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/povikajibon.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/56991323017.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/31323014983.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/ladebusokamodudod.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/lebevurukuros.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/lafuwegibamepipom.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_off0000ee57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE57 10480 bytes
SHA-256: 79dd84bc2a497b5352c8e81012855b3877a758702afbe1f97b3d371127a49585
font_01_sfnt_off00010617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10617 18776 bytes
SHA-256: 7c2bf157b085ca5f2c858d26a0036ab86d54369feb78d1704f1d11ac9b45d76a
font_02_sfnt_off000136ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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