Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aabd998ac16b041…

MALICIOUS

PDF

79.2 KB Created: 2021-03-14 10:23:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3012eac5e6a0d377d0c3ae44b211b6f6 SHA-1: 081c8ae5132f03a0489c8b9d12fdcff0755f0799 SHA-256: 5aabd998ac16b041daece56a8255f019fbca33a1e2ff75d00228b4d633eeba55
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The presence of a URL like 'https://xezojet.ru/wix?keyword=charlotte+rochester+new+york' suggests a phishing or SEO poisoning tactic to redirect users to malicious content. ClamAV and ML classifiers also flagged this file as malicious, supporting the phishing and potential trojan delivery assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/wix?keyword=charlotte+rochester+new+york
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/1710593.pdf
    • http://espaceclient-cmb.com/assassin_s_creed_3_dlc_pc92598.pdf
    • https://cdn.sqhk.co/jinubodilev/MTTjgwr/ping_pong_table_top.pdf
    • https://juviroxekeko.weebly.com/uploads/1/3/5/3/135399696/sudujuwim_piwojutotakusu_ramit.pdf
    • https://ketoleva.weebly.com/uploads/1/3/4/6/134642234/4687b47.pdf
    • https://xixemoxutosiseg.weebly.com/uploads/1/3/4/4/134473276/kamadewasazipaw.pdf
    • http://huseyincanx.com/661210682413mt0j.pdf
    • https://cdn.sqhk.co/devisojop/IiiDeIL/ghost_rider_images_3d_wallpaper.pdf
    • https://jozonoralemepi.weebly.com/uploads/1/3/4/5/134508889/sodil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e2772d3a-b2de-417e-99c6-fda17dbd65d9/rojasolixazepupixekimano.pdf
    • https://uploads.strikinglycdn.com/files/75ecae1e-646e-4912-acfc-6c8131f4db36/how_to_connect_soundbar_with_hdmi_arc.pdf
    • https://uploads.strikinglycdn.com/files/7c2380fb-5775-4a33-9c5e-ba771a1e4774/butadutupugixe.pdf
    • https://uploads.strikinglycdn.com/files/5624e96b-4948-47ee-aa60-5ee7941d7af7/mathematics_textbook_for_class_6_chapter_7.pdf
    • https://s3.amazonaws.com/padanivozeb/pentair_kreepy_krauly_pool_cleaner_manual.pdf
    • https://uploads.strikinglycdn.com/files/80af2f82-7f59-4c53-a3f7-e249d026d198/68713127004.pdf
    • https://uploads.strikinglycdn.com/files/bad45d83-3836-4a0f-934f-1969ab957d17/download_game_adventure_escape_space_crisis_mod_apk.pdf
    • https://uploads.strikinglycdn.com/files/b8862294-1e6a-49d8-8896-edd345d3ba34/can_you_cook_hard_boiled_eggs_in_a_stove_top_pressure_cooker.pdf
    • https://uploads.strikinglycdn.com/files/9a269ec4-1044-469d-af95-adc0a237d3bb/percy_jackson_the_lightning_thief_book_vs_movie.pdf
    • https://s3.amazonaws.com/gonafoziguwewe/grade_1_math_worksheets_adding_and_subtracting.pdf
    • https://uploads.strikinglycdn.com/files/5b74f2a1-30c3-40cd-9da9-1c23f8be5db6/sikiwemopanibikumejisenek.pdf
    • https://s3.amazonaws.com/bokofapig/idle_wizard_abolisher_guide.pdf
    • https://uploads.strikinglycdn.com/files/08ddc943-221c-45c7-9c33-685368cc2db7/google_search_history_on_samsung_phone.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f630.bin
7fc718f9fe8af3ddaf0693ba87bc7fb2e61d6b712670603b9540f87255dc0006		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF630 5052 bytes
font_01_sfnt_off00010767.bin
c85bf3b697b3e61c9ff26e5babaeff5e7cb0ac18f46efec68a2a058bf8d61686		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10767 11368 bytes

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