Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09628392a293f95…

MALICIOUS

PDF

77.4 KB Created: 2021-03-10 21:36:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1cdc0f35468c2293844d8bfb90c26343 SHA-1: 016842574103277430b87d7dfe747a929f894dc0 SHA-256: e09628392a293f9573c4d666ec9f362eb366e49c26d634772945bed3c8dd75fe
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of JavaScript, as indicated by the ML_NYX_PDF_MALICIOUS heuristic, further supports the attack pattern of luring users to external sites.

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://botokaw.ru/123?utm_term=jinja+template+in+django PDF link annotation
    • https://rajepejejema.weebly.com/uploads/1/3/4/8/134860913/7512685.pdfIn PDF document text
    • http://medgaj.com/dawejubn6l4t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421934/normal_601b67dee369e.pdfIn PDF document text
    • http://poverkavoda.website/3rd_grade_math_measurement_worksheetskwf9l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485711/normal_5fd26945adbaf.pdfIn PDF document text
    • http://gaydating.world/jabra_step_wireless_earbuds_blackusbs9.pdfIn PDF document text
    • http://idclick.cash/viresiwifapiminobosurft3l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_6023fe6421a43.pdfIn PDF document text
    • http://reduslimitalia.website/watapexevufuwexw5s06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481166/normal_5fc887490d3c4.pdfIn PDF document text
    • https://rilumegunelado.weebly.com/uploads/1/3/4/6/134615428/6853496.pdfIn PDF document text
    • http://magic-spring.com/what_does_the_word_tempest-tossed_mean_in_englishbj7f1.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/free_pre_kindergarten_worksheets121v8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483591/normal_600a658ac0fec.pdfIn PDF document text
    • http://apparentlyopt.com/propresenter_free_download_full_version_for_macoe3ss.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/682351.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487894/normal_5fcad2a86f0ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369904/normal_5feb7ab6709c3.pdfIn PDF document text
    • https://wukodaxumubef.weebly.com/uploads/1/3/4/4/134438005/9afadf0.pdfIn PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/687759.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_ff1315d3ffc44c669c797fab6b4ebb0b.pdf?index=trueIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_1e9b3a4fc8dc42139949000e2870cb3b.pdf?index=trueIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_391790ed43064a6ca98a9e2828b83f44.pdf?index=trueIn 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_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 5068 bytes
SHA-256: db36144dd2746882d84071707a5d831b41da0373c36af0bba530f20b81ea6786
font_01_sfnt_off0000fd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD88 13188 bytes
SHA-256: 0fcacecdddc79a6601ef8dd5c12a8dd87b1574b94febc484ce871b7f3487c76b

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