Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3477ed77a1c2a2…

MALICIOUS

PDF

75.5 KB Created: 2021-06-07 16:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 43cecc42a75be1f6f615c4e2513d7b10 SHA-1: ec6bf6d2aa7c31c975c3b1aad014538eaa12366b SHA-256: ce3477ed77a1c2a2f15925fedac7c7b0fb2277ffe3d75c0b3500c83f9577fe5c
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 0.9991

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://krisoc.ru/pbw?utm_term=download+adventure+communist+mod+apk+unlimited+money PDF link annotation
    • https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/jurobagoteraj_xopugemibivabux_rexejuxata.pdfIn PDF document text
    • https://malavaxun.weebly.com/uploads/1/3/4/0/134018228/517c6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wejojixi.pbworks.com/f/88544417140.pdfIn PDF document text
    • http://wenitudodub.pbworks.com/f/how_to_get_no_eyes_in_royale_high.pdfIn PDF document text
    • http://mizelabe.pbworks.com/w/file/fetch/144535515/context_clues_example_sentences_answers_for_grade_2.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/w/file/fetch/144630819/dobibujofotewiwisizetove.pdfIn PDF document text
    • http://xelivolofuso.pbworks.com/w/file/fetch/144541344/fokegawozobijub.pdfIn PDF document text
    • http://bunemirudezo.pbworks.com/w/file/fetch/144672948/samsung_one_ui_home_apk_download_latest_version.pdfIn PDF document text
    • http://litorabi.pbworks.com/f/preguntas_y_respuestas_de_la_novela_el_nio_que_enloqueci_de_amor.pdfIn PDF document text
    • http://pilujibos.pbworks.com/f/guvupedosoruduzenaza.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/w/file/fetch/144487014/82217638336.pdfIn PDF document text
    • http://sovamexor.pbworks.com/f/house_on_mango_street_sally_character_analysis.pdfIn PDF document text
    • http://mojuseraneno.pbworks.com/w/file/fetch/144725943/utorrent_64_bits_windows_7_softonic.pdfIn PDF document text
    • http://padimagofo.pbworks.com/f/how_to_update_autel_maxisys_mini.pdfIn PDF document text
    • http://tarogifere.pbworks.com/f/are_skyn_condoms_made_of_lambskin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/164db101-88f2-40be-8513-62cff91c71c5/94994096837.pdfIn PDF document text
    • http://nojewalikar.pbworks.com/f/95232233540.pdfIn PDF document text
    • http://fesabijege.pbworks.com/f/bafezalufenijoteva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb8bdf3-dc69-4f0c-87fb-b9aa55642bf1/sumexapefesewazetawodelim.pdfIn PDF document text
    • http://moxulolo.pbworks.com/w/file/fetch/144753090/filmora_9_all_effects_pack_free_download_mac.pdfIn PDF document text
    • http://zalonuzojeru.pbworks.com/f/what_oil_does_2015_ford_focus_take.pdfIn PDF document text
    • http://tazijebep.pbworks.com/w/file/fetch/144563508/10865692296.pdfIn PDF document text
    • http://daridameku.pbworks.com/f/jijurapuben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1312f0d0-0cfe-4b5c-8651-5a592b531912/tafamukirakariwinu.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_off0000e8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FB 5536 bytes
SHA-256: f540cb514c666ea2bb6d04be7c0949e9a47e9228cade0dce886c5e4739c5c7c9
font_01_sfnt_off0000fbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDC 10524 bytes
SHA-256: f5e85edeec502d39375a14eda443947a13ce2abf83ac2390c819c1e585a073da

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