Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ebcfae1758f1b86…

MALICIOUS

PDF

82.5 KB Created: 2021-05-08 08:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 60929df262a8c888675718f49ab65020 SHA-1: 9ef449ab395fcd5a679103ec909894676ce17721 SHA-256: 1ebcfae1758f1b861f814daffb32768a9ce906a78d2da01fa4d150b5adc1f788
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 0.9997

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://maypoin.ru/strik?utm_term=paulo+coelho+quotes+live+simply PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426545/normal_603bf61819d68.pdfIn PDF document text
    • http://xepewifub.mygamesonline.org/neet_biology_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/tupizurelir/hjl7yLz/gif_papa_can_you_hear_me.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/hfkrjg7/nintendo_game_and_watch_parachute_value.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481058/normal_60271c937ae26.pdfIn PDF document text
    • http://xozowilozoga.mywebcommunity.org/good_strength_crossfit_workout.pdfIn PDF document text
    • https://cdn.sqhk.co/volumusigu/lWjfPid/40958699474.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/aBhchjd/songs_ringtones_for_android_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kipaselofuza/idtebhb/42328852629.pdfIn PDF document text
    • http://luxomozuk.mypressonline.com/ramas_de_la_carotida_interna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403140/normal_5fdf67d8c0700.pdfIn PDF document text
    • http://pisibebix.22web.org/bright_line_eating_meal_plan.pdfIn PDF document text
    • http://pugezesiw.mygamesonline.org/lupagokiteboganudul.pdfIn PDF document text
    • https://cdn.sqhk.co/texojijoraso/chjhdKi/family_dollar_near_me_las_vegas.pdfIn PDF document text
    • https://cdn.sqhk.co/nezuxada/jOgc1jc/light_up_shoes_for_boys.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxubefe/drU05NU/mixabisebubegef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujaxeb.rf.gd/allocation_unit_size_sd_card_format.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/burorevo.pdfIn PDF document text
    • http://mizetum.onlinewebshop.net/car_engine_diagram.pdfIn PDF document text
    • http://zajupulavofawi.myartsonline.com/how_to_memorize_exact_trig_values.pdfIn PDF document text
    • http://disoluje.myartsonline.com/value_investing_books_quora.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_off000105f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F1 5368 bytes
SHA-256: f7e93c5a75854ab31acba45a40d7541aa2f5932b8be4d7792fd7c417aaddcbc5
font_01_sfnt_off00011821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11821 10384 bytes
SHA-256: 2e698286029fea9d350be553d516f586fb85e1e449ae9409a8fee707c51cc829

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