Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ccd97517e40364d…

MALICIOUS

PDF

79.0 KB Created: 2021-05-11 02:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bc5f7089cf6078dbd046dbc35dc95165 SHA-1: 216bdda40ab39ef9919ed73095b95ce09fcae684 SHA-256: 7ccd97517e40364df75a2e659d8e46e80e90a65122239d6de5ebf78ce9b93b57
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI and a high-severity heuristic firing for a redirector link, specifically `https://seumenha.ru/strik?utm_term=john+deere+d140+for+sale+canada`, which is likely used to lure the user to a malicious site. No scripts were extracted, but the overall structure suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/strik?utm_term=john+deere+d140+for+sale+canada PDF link annotation
    • http://mybiol.site/rules_by_cynthia_lord_summaryxu29j.pdfIn PDF document text
    • http://domifonupesif.iblogger.org/ratio_proportion_and_unitary_method_worksheet_class_6.pdfIn PDF document text
    • http://habercigo.com/detective_conan_movie_23_the_fist_of_blue_sapphire_watch_online_redditiy8jt.pdfIn PDF document text
    • http://sweetmeet.online/amtrak_route_map_california_zephyrfg346.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b0b5ced-ae38-445f-850e-ed5bdeaaa9a3/what_is_supply_chain_management_and_its_functions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3f5b92-1a77-47c5-aa43-f8315389c1aa/38783595055.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/puxekidakiditudof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/373becae-c80f-43b9-a7fa-12b94f93ba1d/how_to_make_a_vrchat_world_public.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a6d0fd-b852-4911-8dc6-909ef4c64f9e/32035640652.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/audio_soundboard_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c93e11c-7c35-47db-932f-805945bcd8af/poisson_distribution_mean_and_variance_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6712d422-9e12-49fb-bfc2-b65245f04eb2/87519702201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a624ef-cfea-409c-92c3-17b565f8c69c/how_to_train_your_dragon_characters_and_their_dragons_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e9fd528-69b5-4dd3-9424-bd9c653536b6/graphic_design_courses_fees_in_delhi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de0470fd-b9a3-428e-a266-8c5df5015c18/how_to_listen_to_music_while_running.pdfIn PDF document text
    • http://xelemebimatof.epizy.com/m_audio_axiom_air_49_power_supply.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_off0000f5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EC 5380 bytes
SHA-256: 594a9e939a83d0897047d67b74c8be518808c8a15a45692ce957de02085ea6d3
font_01_sfnt_off00010835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10835 11400 bytes
SHA-256: ef449541367ea8c7686518928941828bd53877a65f3cb9f36de207e9903d95c8

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