Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd5f3a493282a0d…

MALICIOUS

PDF

78.9 KB Created: 2021-04-01 00:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 05843df8938f28a95e4329d901ff9ad1 SHA-1: 8f5ea84c1b9ba60cbbb7949ba0dfca839184c87f SHA-256: bbd5f3a493282a0d26b1dd237e968848a2b584d2541433e9fbc513003f708e02
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=antisocial+personality+disorder+etiology+pdf PDF link annotation
    • https://cdn.sqhk.co/wudenedu/BBih43P/real_train_driver_simulator_3d_apk.pdfIn PDF document text
    • http://jijawaxasaxipaj.22web.org/descargar_numeros_romanos_del_1_al_5000.pdfIn PDF document text
    • http://zorimiba.iblogger.org/applebee_s_jobs_application.pdfIn PDF document text
    • https://cdn.sqhk.co/potonefamuve/jdkShcW/91384122279.pdfIn PDF document text
    • https://cdn.sqhk.co/sikibeve/sjihB7j/on_my_own_song_ross_lynch_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxubefe/ifVGgex/puwazudidadinumanipugef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xoxekojut.onlinewebshop.net/koletab.pdfIn PDF document text
    • http://bipegokatif.onlinewebshop.net/10_branches_of_psychology.pdfIn PDF document text
    • http://zejawira.rf.gd/96513503527.pdfIn PDF document text
    • https://92fbd7ca-8480-4723-bb2c-19523f9dca15.filesusr.com/ugd/29946e_5975d65f4f6a417f80f33c616c95dd93.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/winumigutam/that_time_i_got_reincarnated_as_a_slime_light_novel_volume_11.pdfIn PDF document text
    • http://xavuguwibimovin.epizy.com/antioxidant_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/diesel_performance_air_intake_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/alleluia_mozart_soprano.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/que_es_la_historia_universal_contemporanea.pdfIn PDF document text
    • http://dujupopo.epizy.com/12936337476.pdfIn PDF document text
    • http://xumeweb.rf.gd/bose_companion_2_series_ii_owners_manual.pdfIn PDF document text
    • http://wegugoleta.onlinewebshop.net/bedebivugamijutipaf.pdfIn PDF document text
    • http://kaguwetu.epizy.com/lopavibolaroko.pdfIn PDF document text
    • https://3dd85f33-233b-4b3c-8e53-142bc8307eec.filesusr.com/ugd/8df890_849fcbbbbcf34893a9533a43d08bf6ff.pdf?index=trueIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_df97619c1f7947dd9ddd3fbaebecdad8.pdf?index=trueIn PDF document text
    • http://tigagatu.atwebpages.com/brandenburg_v_ohio.pdfIn PDF document text
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_3dcb3e208a714a4caa3a2e3a865fa6fb.pdf?index=trueIn PDF document text
    • http://zinebozozapi.rf.gd/information_asymmetry_market_failure.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_off0000f557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF557 5416 bytes
SHA-256: 810367d4e6dcf31a05fcda8763f8ce47a5eb0f852c3ef4857f54e907aa1f52b9
font_01_sfnt_off000107e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E2 10984 bytes
SHA-256: 866527d0619d654380bc69182797f2f0f263bf5448c3ec23a2357494522761be

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