Malicious PDF — malware analysis report

Static analysis result for SHA-256 c733a0cca1cfb196…

MALICIOUS

PDF

80.3 KB Created: 2021-03-05 03:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 78eaefe188fd84a86bbc9f107ed0bf18 SHA-1: 8a1719ae87af92526b3e9b0cf20c039b772fc985 SHA-256: c733a0cca1cfb196d96fbc57023084ef5ec88b9bba650a0e86c5cd04cc603f9e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a link farm designed to direct users to potentially harmful websites. The presence of an external URI and the ML classification point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/award?keyword=what+is+processing+disorder PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478146/normal_60415943813e7.pdfIn PDF document text
    • https://redodire.weebly.com/uploads/1/3/1/4/131408340/2684065.pdfIn PDF document text
    • http://bivozebavi.iblogger.org/24576588702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_6040626400238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_6027c3a2e156a.pdfIn PDF document text
    • https://barefofu.weebly.com/uploads/1/3/4/4/134492989/5409720.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473044/normal_5fc762665cf0d.pdfIn PDF document text
    • https://zoparimunafixi.weebly.com/uploads/1/3/4/3/134336740/zitusadedos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489237/normal_601e4d8b3353c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zitoxilafeguxu.rf.gd/is_chick_fil_a_serving_free_breakfast_tomorrow.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/behringer_xenyx_x2222_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/polaris_360_one_wheel_not_turning.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/2902167806.pdfIn PDF document text
    • http://sovizurimi.rf.gd/jokozapibopexitaf.pdfIn PDF document text
    • http://sulalanetoki.epizy.com/cell_lysis_methods.pdfIn PDF document text
    • http://fozipifi.epizy.com/omron_bp710n_vs_bp7100.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/ap_human_geography_practice_test_agriculture.pdfIn PDF document text
    • http://rodumotafab.rf.gd/applied_machine_learning_in_python_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/jipiwevumapetoramodev.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/luwumoxi.pdfIn PDF document text
    • http://kugibujupedo.rf.gd/philosophy_textbook_grade_12.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/20303273913.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/introduction_email_to_new_team_template.pdfIn PDF document text
    • https://medlineplus.gov/esophagusdisorders.htmlIn 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_off0000fdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC2 5316 bytes
SHA-256: 100244a60e9cd5847295725ba3fa6eed817108cc4535e4e23a8199910739a26d
font_01_sfnt_off00010fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDB 10824 bytes
SHA-256: ffc9decfe7f1e0c0daf59e405cd7e762c2a29863ea171e3c40e6168536fe0167

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