Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4f617c9dcb88bd…

MALICIOUS

PDF

101.4 KB Created: 2021-05-13 19:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bf2a2fa87ad17c71a2e3cb5403e98215 SHA-1: dccee718628b189ea7aede73c5dbed06ddd645b4 SHA-256: cc4f617c9dcb88bd68a357753c4fbb560c6caf8ae09cb5528181f0f5970b74cb
166 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 0.9945

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dugedepap.ru/strik?utm_term=what+is+a+30+30+rifle+used+for PDF link annotation
    • https://cdn.sqhk.co/jivonaxadu/dFqtiMh/revolico_muebles_de_uso_en_cuba.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/78661811348.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/chhheHj/tv_series_quiz_questions_2020.pdfIn PDF document text
    • http://fosukejasalefep.22web.org/komujatexakabufepi.pdfIn PDF document text
    • http://sulogajifuv.iblogger.org/body_for_life_memphis.pdfIn PDF document text
    • https://cdn.sqhk.co/xafogatok/ii1xie4/planet_zoo_sandbox_settings.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/ithdluw/colors_of_the_rainbow_song_signing_time.pdfIn PDF document text
    • http://fonivoguko.medianewsonline.com/fivufemigagova.pdfIn PDF document text
    • https://cdn.sqhk.co/goxepijikun/gggjhhh/gozifobokum.pdfIn PDF document text
    • http://muvariwiporiju.iblogger.org/uitzending_bijwonen_formule_1_cafe.pdfIn PDF document text
    • http://wemorewabadeluz.mygamesonline.org/body_beast_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwezomu/ihJcrib/ceqa_guidelines_2018_book.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/fjghj0H/bupef.pdfIn PDF document text
    • https://cdn.sqhk.co/salejejo/ixgfxgg/96442829231.pdfIn PDF document text
    • https://cdn.sqhk.co/devuzemalut/Wthi0qK/men_s_soccer_world_cup_2022_host_country.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e877d418-af41-462e-9780-82375570bef6/kowamarumatubad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5364c0-a46d-4e48-89b2-7e905e735d5f/lovogub.pdfIn PDF document text
    • http://gunijeru.rf.gd/giwenukevibisogewag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dad9328-14fb-423f-9adb-12c8ed84289d/lijawusajalubezesazidudo.pdfIn PDF document text
    • http://rinubef.epizy.com/composition_book_cover_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e55d969-7339-4236-a986-e88851dcf81c/como_crear_un_archivo_comprimido_con_contrasea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9f6f676-dcfb-4dbd-adb4-9c41a7648d4d/the_crown_season_4_episode_10_christmas_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2799c5c4-1d2f-4194-8bc6-166d99bf99e2/how_do_i_find_my_rinnai_error_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf29c621-dd47-4cb6-a30c-e8ece54a82aa/wildgame_innovations_feeder_says_jam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bb87f89-01ad-4f91-9832-992e78f6bcce/father_and_son_novel_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f30bdb2-4ca1-4254-accb-e677d54251e2/matlab_basics_book.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D48 5312 bytes
SHA-256: 5cf0595e09147d92ef880bfad26e7a04f1a13e64e68ecbfbe9dd2fca155be855
font_01_sfnt_off00014f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F56 10684 bytes
SHA-256: acd9eb5b4cf896e9c19299adba2603894ae9124c84e04b48ff1a865e6835684b
font_02_sfnt_off00017451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17451 16060 bytes
SHA-256: c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c