Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa24695e09e16e05…

MALICIOUS

PDF

70.3 KB Created: 2021-10-02 23:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0db2b1ea64f9078793e6d0b49342c650 SHA-1: f144f569e1976460e74fc3cad666564e5ccd37e8 SHA-256: fa24695e09e16e05f3e2e2c1afc98b7d7ea126c2ddd638933a09954b70a51772
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded JavaScript and a large number of external URIs suggests the PDF is designed to exploit vulnerabilities or lure users to malicious sites. The numerous distinct hosts and UTM parameters in the URLs point towards a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://krisoc.ru/uplcv?utm_term=greg+laurie+prayer+request PDF link annotation
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/govaxufegakanujobukevapa.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/vamomajil.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b823f452d2---zabuvix.pdfIn PDF document text
    • http://svx.su/ffile/file/polonob.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/demaxojukedija.pdfIn PDF document text
    • http://halanmilk.com/upload/files/bifus.pdfIn PDF document text
    • https://clubon.top/uploads/files/98390619747.pdfIn PDF document text
    • http://asia-test.informacittadino.net/media/files/86241421669.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/donikunodedegizobizozem.pdfIn PDF document text
    • http://fatename.com/uploads/files/202109190233132934.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/nujufamiwug.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ec4jccv9knriec1ulodvtvmf12/26745249544.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/nibabenisivufakaseliru.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/wiwupolefitajojalowubirot.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/65524182519.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/54233730269.pdfIn PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/xuxemivubitarebudunir.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/75748644530.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/dunutu.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/43586428883.pdfIn PDF document text
    • http://hausdergesundheit.net/userfiles/files/60096641859.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/bokef.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_off0000ae16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE16 17196 bytes
SHA-256: 3e103452bd861e5ed31b755410a80a1c014c06c9ceec4ea23f0bfa4e8d7cac05
font_01_sfnt_off0000da7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7B 10600 bytes
SHA-256: b12cdeef3c9268da5708a914341ea3c5969a25ca54f8a1048fef2187315f6aaf
font_02_sfnt_off0000f28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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