Malicious PDF — malware analysis report

Static analysis result for SHA-256 584d93dd57f716d7…

MALICIOUS

PDF

76.3 KB Created: 2021-02-25 17:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9e4eb7b8f5848c0cd4aa904f4c2859a7 SHA-1: bb4042c9e3a7fba23becdcbc1af173e13e2e5cb9 SHA-256: 584d93dd57f716d7f1523976d85489d78006e65a0167eaf8570d0c8f4842f42d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on disposable domains, suggesting an attempt to host malicious content or phishing pages. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest it's designed to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/wb?keyword=how%20to%20pair%20microsoft%20bluetooth%20keyboard PDF link annotation
    • https://cdn.sqhk.co/tebolugex/heBRPdW/hair_clipper_prank_app_download.pdfIn PDF document text
    • http://merogerofame.66ghz.com/alaska_waterfowl_guide_license.pdfIn PDF document text
    • https://cdn.sqhk.co/birugafomafo/hefihia/at_t_smart_wi-_fi_extender_airties_4920.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/xeludadedu.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/jjiggg8/14682186952.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/under_the_dome_season_3_episode_4.pdfIn PDF document text
    • https://cdn.sqhk.co/sidogorego/iibgcvN/tikbooster_fans_followers_likes_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/PhhhQih/total_net_carbs_for_ketosis.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/79103728891.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/ygeNfQm/backpacking_first_aid_kit_checklist.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/hp_photosmart_d110_printer_wont_print.pdfIn PDF document text
    • https://cdn.sqhk.co/kowaziwaso/iiih6jf/69211702616.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/the_vampire_diaries_painting.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/gjigEKD/police_chase_in_toledo_ohio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://memaded.epizy.com/dragon_age_inquisition_strategy_guide.pdfIn PDF document text
    • http://bomumude.epizy.com/dantes_inferno_levels_of_hell_and_punishments.pdfIn PDF document text
    • http://jitemawuvefogox.epizy.com/basis_of_apportionment_of_overheads.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/what_is_the_sum_of_exterior_angles_of_a_regular_polygon_of_nine_sides.pdfIn PDF document text
    • http://nununad.myartsonline.com/what_do_you_mean_by_short_story.pdfIn PDF document text
    • http://sixerukiboreta.epizy.com/65738859431.pdfIn PDF document text
    • http://pujumek.myartsonline.com/fifty_shades_of_grey_netflix_usa.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_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 5756 bytes
SHA-256: 7cfd9b710752a767f9ae498cb8ad012efb65dee27c064100ead2ab7a9edbca66
font_01_sfnt_off0000fe19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE19 11032 bytes
SHA-256: e13195c3edd81854544088b26f31ef8ca2d76ffedadd4cdec6b9c209d23453bc

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