Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f62f3e2d8327b0d…

MALICIOUS

PDF

79.8 KB Created: 2021-03-10 17:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4d88e4b4e8c19ed686d3bdc3a58fad61 SHA-1: 9a2c8fd60d9dbea0708eee9c5822543076b8e498 SHA-256: 9f62f3e2d8327b0dec6552ff32c786b017dc7a6f8824d1de067eb59214d5a0e0
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://maypoin.ru/wix?keyword=hindi+worksheet+for+class+1 PDF link annotation
    • http://ostanni.fun/comparison_of_adjectives_worksheets_grade_2d0wo5.pdfIn PDF document text
    • http://italylife.pro/musawiveav3.pdfIn PDF document text
    • https://cdn.sqhk.co/zajikeze/dzie2km/21586138162.pdfIn PDF document text
    • https://cdn.sqhk.co/bakavaxa/RVq30IV/programa_vida_saludable_sep_2020.pdfIn PDF document text
    • http://givotovujoded.22web.org/facilities_management_best_practice_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/fYUgegd/strikers_1945_2_cheats_android.pdfIn PDF document text
    • https://cdn.sqhk.co/papazokixe/dPiiNkl/earth_live_wallpaper_apk_download.pdfIn PDF document text
    • http://zebinoleruf.iblogger.org/nusokujegopuzepenajazo.pdfIn PDF document text
    • http://my-favshopc.online/adivina_el_animal_juego_para_niosojo4u.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/WXhipEl/31761504509.pdfIn PDF document text
    • https://cdn.sqhk.co/rorifugera/Mhfggdm/romancing_saga_re_universe_tier_list_reroll.pdfIn PDF document text
    • http://wabuxon.iblogger.org/matthew_hussey_marriage_advice.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/giujhyw/bafufuvuraxivuduwawuvux.pdfIn PDF document text
    • http://zhigina.ru/antivirus_creator_1._4_proh0cn8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3964a396-0fd4-411f-a7b5-131ed8f3366e/3911154233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bea786e-11eb-4278-acf1-1b2397b9f8fb/post_civil_war_reconstruction_period.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/pastest_mrcp_part_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/pawanabala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d079e5-78cb-4ba4-b39b-f7f2b44042fb/oklahoma_state_football_schedule_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c481bffa-b6be-41b6-b18e-72b4d4109a74/nokenegigonokegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/896fb588-95fc-411a-b817-d8598e3d7d82/nadodat.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/help_informatica_brasilia.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/extent_report_html_is_not_generated.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE99 5064 bytes
SHA-256: ce7c703d0ac784b4be0d743161b6955bb72e49c59bfbbb766f4bc8a6c762929d
font_01_sfnt_off0000ffd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD6 10392 bytes
SHA-256: 58a5b61af19feabdd00b42b5ff3ea50e1d82c2fab823ee75165778013d9d3799
font_02_sfnt_off0001232b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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