Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3ca52a3df9659a…

MALICIOUS

PDF

132.6 KB Created: 2021-05-14 03:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 105c92556cff6cbb77027f03688cd929 SHA-1: 1d953d04f8d5cfd1aca96353479aa31860339074 SHA-256: ba3ca52a3df9659a28a5c6ba4ccc50dc0dc457855d9efb7f800d3bd80982d0f8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://gimoguvi.ru/strik?utm_term=what+religion+uses+the+book+of+enoch PDF link annotation
    • https://cdn.sqhk.co/kogujipubap/PrgcjeQ/30312066921.pdfIn PDF document text
    • http://sibasijiv.22web.org/fonebipefonusotilesozogeb.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/heji3ig/dunkin_donuts_menu_iced_coffee_calories.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/giIgfhj/4_pics_1_word_daily_bonus_puzzle_norway.pdfIn PDF document text
    • https://cdn.sqhk.co/veladaxuzeba/ifUjcia/mi_musica_es_un_arma_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/idjchc7/burger_king_coupons_breakfast_2020.pdfIn PDF document text
    • http://theharaka.online/how_to_make_a_scalene_right_triangley2pn5.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/rhagfhe/kibosoveg.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikunakudu/gfkSUii/youcut_video_editor_apk_mod.pdfIn PDF document text
    • http://lidlid.xyz/74014914786f7u2n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nawatelobuj.rf.gd/beast_boy_titans_transformation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b76112f2-fd45-450e-9953-e2a6a1c374e8/how_to_take_the_top_off_a_whirlpool_cabrio_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/foxemos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d07dab1-645f-4b5b-906c-90643538f3c8/remington_1187_rifled_barrel_20_gauge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7471d26-f2f5-44c0-a2ae-79948c744824/will_after_we_collided_movie_be_on_netflix.pdfIn PDF document text
    • http://zejenideve.rf.gd/what_is_scouts_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf3f265-e0b3-482b-a49f-c5b94ae14fdd/wanelogoba.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/inverse_linear_functions_worksheet.pdfIn PDF document text
    • http://majerowi.epizy.com/area_perimeter_volume_formulas_for_all_shapes.pdfIn PDF document text
    • http://wosumobikufiw.rf.gd/1147582480.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17649 20436 bytes
SHA-256: a30a77c81a6a54fa867c23725f71948b70a6af52fda276dcf33f436f543c409e
font_01_sfnt_off0001ad34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD34 2912 bytes
SHA-256: 379102226829f3bab3a3c763e92e857047a50d0750f2cd7a3c42e86eaecd7746
font_02_sfnt_off0001b798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B798 5360 bytes
SHA-256: eb59305af53b314966b51db3b6b077c452d3718b2ab8cfb0c577c9eaa658c2c7
font_03_sfnt_off0001c9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9E4 18696 bytes
SHA-256: c2da56a082895021b72ac21872d454949ba4144db127d57b044ba36d35e2964a

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