Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62dfb5ac8945a82…

MALICIOUS

PDF

81.3 KB Created: 2021-04-29 05:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 74b8a04ef5f62cfe749191ed13eab5d0 SHA-1: e1857c76c249c80223f745176f00d9aaeb80fc60 SHA-256: f62dfb5ac8945a827206af0f2be69cb26d7d1900a4d5ada73f54007d31467cfd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to downloads, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=govinda+namalu+telugu+download PDF link annotation
    • http://quinzsy-studio.design/26032299210vr6he.pdfIn PDF document text
    • http://idealslimitalia-official.site/80450175786akpx7.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/jcwLoEd/spaceflight_simulator_rocket_design_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445531/normal_5ffece9bd456a.pdfIn PDF document text
    • http://ita-talia.fun/what_are_smart_objectives_examples9prkd.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/bruce_lipton_ita.pdfIn PDF document text
    • https://cdn.sqhk.co/visipapafef/ghgiMWr/landscape_ecology_richard_forman.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/kyNhipH/world_freekick_tournaments.pdfIn PDF document text
    • http://shopeuro.pro/night_owl_home_security_camera_reviews2za12.pdfIn PDF document text
    • https://cdn.sqhk.co/nezafomura/WieP6Su/tiny_little_racing_2_mod_apk.pdfIn PDF document text
    • http://homearfes.com/niruduxoriripisoxogupizuleeeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449405/normal_605cb1601cb23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_6063a50352327.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/79488413694dy4wy.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/Jgj8jaM/pemisinogafesalu.pdfIn PDF document text
    • http://juraxoxodas.scienceontheweb.net/towipuzavawarijobugam.pdfIn PDF document text
    • http://zesamoa.online/how_to_write_a_text_response_essay_year_12o9wdp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451348/normal_602e0e9f4d9fe.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/61677863664.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/96gcijA/control_products_denver_colorado.pdfIn PDF document text
    • https://cdn.sqhk.co/lilajibusizu/iwheQ2K/46295406939.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489839/normal_5ff7d83c0730a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://mawokale.myartsonline.com/siemens_hearing_aids_prices_uk.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE8 5052 bytes
SHA-256: ef0bfed84a9a1feffc52c8d9c3413060b45829fbbb3abdd344362daa37d7a026
font_01_sfnt_off0001011f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011F 4452 bytes
SHA-256: d788f7411b6d1cc4c5543d6cea83147677489a7e9dcbb636f7a4373b7759d185
font_02_sfnt_off0001115e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115E 11472 bytes
SHA-256: 0a3837f5582f79825779c7c948a45568409ee43c9e82ad5a56fbc190a2022dc5