Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2067285316c7a2b…

MALICIOUS

PDF

74.9 KB Created: 2021-03-29 18:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a98fb91663e18f481d6677a5fc06174d SHA-1: 3909dddbeacb43cf42eab65fcd2b9c3ff575d2d5 SHA-256: b2067285316c7a2b97de6de86497f8ccfebb13e66f07c9830893246ef2f30484
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL `https://jottigo.ru/award?keyword=adobe+scan+pdf+scanner+ocr+pro+apk` suggests a phishing or malware distribution lure, masquerading as a software download. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly point towards a malicious document designed to trick users into visiting a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/award?keyword=adobe+scan+pdf+scanner+ocr+pro+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384464/normal_5fe1bcd1149f1.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/what_pros_use_project_x_lz_shafts.pdfIn PDF document text
    • http://xezixaz.getenjoyment.net/vowezokevedorexamu.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/what_is_the_meaning_of_life_according_to_the_book_of_ecclesiastes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391611/normal_5ff1de0ee3cfb.pdfIn PDF document text
    • http://wojisub.mypressonline.com/should_i_buy_a_house_july_2020.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/dogevazapiwediw/what_is_a_materials_engineer_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d24bbd-05f7-4f6f-ba47-34e3def33d3d/rupufedufoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/464f70bb-22d0-454e-96b7-75ab9e1fba9f/40057051293.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/finding_equivalent_fractions_worksheets_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/78678772508.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/diy_earthing_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee79375f-0087-448b-875e-de7315ea5675/how_to_program_a_clicker_keypad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ac3c91-fdc5-497d-b1b1-f23d3d6d4b2f/ikea_online_catalogue_singapore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ee4e5f-4646-4541-8c31-b4db632c66f2/little_red_riding_hood_song_lyrics_sam_the_sham.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ed6e89-dddc-4f61-8d43-5c4301a10907/zafaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec36ce4e-e73c-4896-99bf-852667b7c910/what_is_divine_comedy_about_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/postmodernism_or_the_cultural_logic_of_late_capitalism_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/burger_king_menu_hawaii.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/god_of_war_3_ps4_trophies_guide.pdfIn 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_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 5308 bytes
SHA-256: 04a9543b33fb7e9895f40f71700a64f2007369aac3c4919f211da98058cd2b8b
font_01_sfnt_off0000fe08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE08 13472 bytes
SHA-256: f8bc300361e84c8eef8f8a57e50ac3ac8341a8e934a6caa9591afa18153eb1a2

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