Malicious PDF — malware analysis report

Static analysis result for SHA-256 0754af01562f5ea8…

MALICIOUS

PDF

74.0 KB Created: 2021-03-04 21:27:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7d3ec086dea2dd0e486bc3069f883796 SHA-1: 299e6f278c06fbefb81bc9e1b06651e8cce0c9dc SHA-256: 0754af01562f5ea8d00d72f76387db86618b1a815d687caf224d9f4c290d242f
136 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing or trojan. The document body, though heavily obfuscated, contains references to a 'Samsung snh-e6440bn manual' and uses wkhtmltopdf, suggesting a lure for a technical document. The primary IOC, 'https://seumenha.ru/wix?keyword=samsung+snh-e6440bn+manual', is an SEO redirector, indicating a phishing attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/wix?keyword=samsung+snh-e6440bn+manual PDF link annotation
    • http://sowopezamiw.medianewsonline.com/wind_turbine_advantages_and_disadvantages_ppt.pdfIn PDF document text
    • http://onlajn-kassa.ru/97751966731fipbq.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/social_implications_of_climate_change_in_southern_africa.pdfIn PDF document text
    • http://munasimowijuxi.getenjoyment.net/25313049361.pdfIn PDF document text
    • http://future-techno.ru/fervor_de_buenos_airesfjdf3.pdfIn PDF document text
    • http://fullstacket.online/bull_sf_manual_patch3zfci.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/dark_pools_scott_patterson.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/vevaxezenenifadexarebinexx6y7.pdfIn PDF document text
    • http://findattime.com/89479747329l0d23.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/lojelinuzu.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/pretty_little_liars_season_7_episode_20_google_drive.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuwijiti.myartsonline.com/65975369342.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/giwalafemufiv.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/agust_d_full_album.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/wenexumezagabese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/559c6dd0-ce8d-4296-8be7-6e61ed5bc363/suxuvosujafajivugibijad.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/application_format_for_getting_permission.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e3ebbda-f410-47d9-b6b3-fcf16fe83013/short_reading_comprehension_test_with_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0152317b-b2e2-45ce-b512-af525cb15728/ac_joint_dislocation_physiotherapy_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f032038-0cfc-4810-87b3-5d4f1cbd11c2/how_to_draw_a_nose_for_beginners_step_by_step.pdfIn PDF document text
    • http://gekolutewubel.myartsonline.com/what_math_topics_are_on_the_gre.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/76446281810.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/10413644225.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46D 5660 bytes
SHA-256: 9494fad748de323d09667ef4e9aeac903bfa088e4f530dc94a8b493bf20cf115
font_01_sfnt_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 10264 bytes
SHA-256: 968f67eaa90c913b19a0bbb576fcf549b5dac7b340ded829ec6337f48838c7c2