Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff232e2e82c131f…

MALICIOUS

PDF

76.4 KB Created: 2021-03-16 20:02:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6fea4d6e649b6dd9a21b3e24dbb23ae5 SHA-1: b129c5598da40b61cfdb0e3fb5e3fad8b2fbaf87 SHA-256: cff232e2e82c131f7acf85e23e6690357de50bf4fa75e3e5a03b5a1b4f67b1b6
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 0.9997

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://jumiwimov.ru/wix?keyword=situs+poker+online+idn+terpercaya PDF link annotation
    • http://kedejivebirago.iblogger.org/letter_m_worksheet_for_kinder.pdfIn PDF document text
    • https://cdn.sqhk.co/vezukefuza/giifpUw/accounting_ledger_forms_free.pdfIn PDF document text
    • https://cdn.sqhk.co/ramojezi/ifgT7TK/gibenobelojewudu.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/what_is_the_best_70_inch_4k_smart_tv.pdfIn PDF document text
    • http://zuxekagapefe.mygamesonline.org/52202114782.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/how_to_open_ezdrummer_2_in_pro_tools.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/TljdKid/tap_shots_2.pdfIn PDF document text
    • https://cdn.sqhk.co/mipekakiri/cjdjhWq/bluebird_song_naruto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_2e35768a48784e53aad723ea61880242.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/bts_army_amino_app.pdfIn PDF document text
    • http://rulezebasax.epizy.com/mary_poppins_returns_songs_lyrics.pdfIn PDF document text
    • https://fff5164c-1337-4dca-a870-9ee8129e9d1f.filesusr.com/ugd/11cbe4_9f493c1bbc124d7db54a8a69169e42fa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pubopelej/vasuniroxaded.pdfIn PDF document text
    • http://jipudovisubu.rf.gd/android_developer_guide_dialog.pdfIn PDF document text
    • http://toxukanubevaga.rf.gd/thermal_expansion_physics_def.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/the_logical_song_mindless_self_indulgence.pdfIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_bfeeadfab8a8475ea512486d2d392cba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dusined/faxetuvo.pdfIn PDF document text
    • http://kaporeko.rf.gd/icse_maths_book_class_6.pdfIn PDF document text
    • https://5e04165b-6ab1-49a6-9937-45006fc2fbeb.filesusr.com/ugd/d19879_f5ab94c4c3bb4f2e9bdf99f02e373864.pdf?index=trueIn PDF document text
    • http://jowokepo.atwebpages.com/chuyn_hnh_nh_png_sang.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_off0000ed3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 5336 bytes
SHA-256: 0c11b293f2f9100855a7294ceac7480771006b280ab586d3f20aa54b979a78cd
font_01_sfnt_off0000ff7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7D 10900 bytes
SHA-256: 173650d2220303ed0fc7959fb8ea349250b25e3c063fe2bac95b79ba1060ab8c

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