Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9044de8a0520ade…

MALICIOUS

PDF

71.2 KB Created: 2021-03-29 00:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a77ab8ae72f65141c4ad940379933cdd SHA-1: 674fbe71305d4e9e9cfe4150eb4584c5532fb945 SHA-256: b9044de8a0520ade1ec0641d347d2a142c5de7b26efdf25b068a539e93555fd4
134 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document's structure and URL patterns suggest it is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/award?keyword=datasheet+templates+pdf PDF link annotation
    • https://cdn.sqhk.co/dujagazatad/i6njeBC/zilovetavari.pdfIn PDF document text
    • https://cdn.sqhk.co/pumapajewa/gighmfS/houma_today_police_reports.pdfIn PDF document text
    • http://jutovutivori.22web.org/buniluvesawefabapevenik.pdfIn PDF document text
    • http://rumudasejozekes.iblogger.org/riremufuwonerener.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/jhaBSjf/jojepemateletetir.pdfIn PDF document text
    • http://matasojebare.iblogger.org/mevirakitemazonilomar.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/4CjdIhc/knife_sharpener_reviews_cooks_illustrated.pdfIn PDF document text
    • https://cdn.sqhk.co/votexeruwiti/agd7jie/lusikafutodifemovefuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/dabanivaduzoli.pdfIn PDF document text
    • http://terovolej.rf.gd/artificial_intelligence_a_modern_approach_third_edition_solution_manual.pdfIn PDF document text
    • http://bajivuselome.epizy.com/89796684873.pdfIn PDF document text
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_f953b14c590e4f1f823202096e4ed582.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xozeb/dusosaxikif.pdfIn PDF document text
    • http://lunupoxupa.rf.gd/69391373645.pdfIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_c24353376bf24d1dbc7fe20f808d24e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/bbc_iplayer_video_capture.pdfIn PDF document text
    • http://lenawevurokolup.epizy.com/does_american_assassin_have_a_sequel.pdfIn PDF document text
    • http://fonezitugomal.rf.gd/benumugunemawutoxumi.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/how_to_treat_coliforms_in_well_water.pdfIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_f714d2c2435d48118cc2444734a03701.pdf?index=trueIn PDF document text
    • http://vawusizajuxo.epizy.com/conditional_statements_worksheet.pdfIn PDF document text
    • http://xefalisudowitab.epizy.com/party_flyer_template_indesign_free.pdfIn PDF document text
    • http://datidalumoz.rf.gd/bsc_modern_physics_notes.pdfIn PDF document text
    • http://kilirafesiva.epizy.com/vemizarikes.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_off0000d9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E8 5184 bytes
SHA-256: 82270ab28b4b7a81018604a11382ac071e0fb50eb2ae1b3f8591b670fda563ec
font_01_sfnt_off0000eb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6C 9968 bytes
SHA-256: a76c25970cf54e3211a1ce245d264bdd19fdcf46feb3c057fe7d575655697fa9

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