Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99395e3eb169b61…

MALICIOUS

PDF

83.1 KB Created: 2021-03-06 17:05:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e474b99dac0bcfad49b3764f215eb537 SHA-1: 49e0c75b5646b66e4117a38cd03909bd3f333ff4 SHA-256: c99395e3eb169b61d9d73a5e642e4c8ae241f816a7575eb30ac5c366aaead581
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate maliciousness, specifically a phishing attempt related to legal documents. No scripts were extracted, but the presence of an external URI suggests the document is designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=how+to+become+someone%2527s+medical+power+of+attorney PDF link annotation
    • https://cdn.sqhk.co/ginijetemepa/hbgdhjh/wallpaper_hd_for_mobile_free_download_animated.pdfIn PDF document text
    • https://cdn.sqhk.co/kapideto/hhibEhd/pac_man_boxer_net_worth.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/vatobonupofemovorutem.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/BFtgghi/beam_of_magic_roguelike_heroic_adventures.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/ford_555_backhoe_transmission_parts_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/pusobatosip/Vgdhgji/cafeland_world_kitchen_celebrities_favorite_food_list_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/purilusevike/inJLhcK/among_us_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/jggdShg/abcmouse_free_login_password.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/RjfgcHX/new_bike_games_for_pc_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zofagopipowi/RRiejc4/94110135741.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/what_is_the_point_of_tom_bombadil.pdfIn PDF document text
    • http://fisuzes.epizy.com/free_template_bootstrap_4_login.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/ihk_berichtsheft_bayern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53cda793-bcf4-4adc-88a3-5fac01955540/baby_groot_and_baby_yoda_t_shirt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaafe06c-1c6a-459c-9d5c-7cd06162cb66/restaurant_mania_unlimited_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/53104131291.pdfIn PDF document text
    • http://rupawuvafe.rf.gd/2160065316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ba14a6-4b14-4893-ba1d-b2cb7cc679a7/wezekosumavibuzagat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886724e7-7d65-4f41-b4c9-9308c52d18a7/how_long_does_it_take_to_assemble_a_portable_basketball_hoop.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/are_there_any_places_open_to_get_a_haircut.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_off000106ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EA 5628 bytes
SHA-256: 5187de6e57627df2710e208b86ff2279dc87ddd697eba42fb9ce52bad1fb7f2d
font_01_sfnt_off00011a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0D 10764 bytes
SHA-256: e663068550dae6eb9aac45a522b594f597b1385cdd33870c3501256e45f12d8c

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