Malicious PDF — malware analysis report

Static analysis result for SHA-256 7148a816e4ffc21e…

MALICIOUS

PDF

79.4 KB Created: 2021-04-01 17:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5169518309ce8fcf05ef709bed1fd65d SHA-1: 97b2097bb4235c162c227684f7b55a61f9728e2e SHA-256: 7148a816e4ffc21e7b6dd8fd7443962125e715c139581ca25b3529050cacc7a2
126 Risk Score

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 0.9993

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://xajibur.ru/aws?utm_term=how+to+set+heat+mode+in+samsung+ac PDF link annotation
    • https://cdn.sqhk.co/xogovofofi/jigj6x5/vector_full_mod_apk_rexdl.pdfIn PDF document text
    • https://cdn.sqhk.co/falugojafat/GjfEmE2/tennessee_titans_covid-_19_cases.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/gijigjv/roblox_piggy_book_2_chapter_3_release_date.pdfIn PDF document text
    • http://gukibipujuregof.22web.org/outback_steakhouse_menu.pdfIn PDF document text
    • http://puveduxorapuba.iblogger.org/the_enormous_turnip_short_story.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.pdfIn PDF document text
    • http://nefutekugurenap.mygamesonline.org/apicultura_no_brasil.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/ZjiihcW/repost_for_instagram_not_working_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/jgfixRm/hmrc_self_assessment_investigation.pdfIn PDF document text
    • https://cdn.sqhk.co/xobabowiwa/NFjggRf/73786781540.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/Glkhdib/the_lego_movie_2tm_movie_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/juvekuvop/geichbt/coloring_sketches_book_for_life_outfit_ideas_male.pdfIn PDF document text
    • http://wafapolinan.iblogger.org/sorot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pivimufe.atwebpages.com/89622914725.pdfIn PDF document text
    • http://midekudaxigol.rf.gd/ics_3000_pump_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07cfb5a4-4140-44d7-9064-346a1db0fe80/wdtv_live_replacement.pdfIn PDF document text
    • http://zijikani.rf.gd/74316613784.pdfIn PDF document text
    • http://jarewixefokoxem.epizy.com/meditation_studio_app_for_android.pdfIn PDF document text
    • http://dirosulazab.rf.gd/administracion_hotelera_division_cuartos.pdfIn PDF document text
    • http://muvelexadaw.epizy.com/ncaa_march_madness_predictions_bleacher_report.pdfIn PDF document text
    • http://wolunotolebo.rf.gd/sowavife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4548c9b-a135-435c-9bbb-9e9bd3a4220f/64897854933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa3d1a6c-b907-472d-9dcc-490ac6d19194/sapper_leader_handbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc192ed-e555-4bcd-9be1-d718b965fe2d/lekovitowepe.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_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 5280 bytes
SHA-256: 3351854e8c971da85d2210481003e706c14df452908129bfc40b18d6950d535d
font_01_sfnt_off00010b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7F 10768 bytes
SHA-256: 0208aeee7189de35e6520ce622ec7c043ad25fff0308aaf4467321d8b7d45858