Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebfb4c2cd633fb67…

MALICIOUS

PDF

75.8 KB Created: 2021-02-23 14:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f90ee27c6fdf9da8842b4bb6553de023 SHA-1: 4b359ad28d7db4e0ca684fa22511ce24cb2c2256 SHA-256: ebfb4c2cd633fb675bb3bfbbb7bdd9a309f4cb454ff9f9e6b61dfb5b21819b93
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF link farm, with the primary goal of directing users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive content, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://seumenha.ru/wb?keyword=strength%20training%20exercises%20with%20dumbbells PDF link annotation
    • http://adv-workshop.site/392433576633hpoj.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/4jiMPxn/46727956486.pdfIn PDF document text
    • https://rixonusoraj.weebly.com/uploads/1/3/0/7/130738646/3447296.pdfIn PDF document text
    • http://tilikeleboz.iblogger.org/dalidiwavexonobu.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/ddPjbF7/luxury_car_simulator_hack_mod_apk.pdfIn PDF document text
    • http://losiruwu.66ghz.com/awful_to_contemplate.pdfIn PDF document text
    • http://qlemelest.online/cma_awards_2017_eddie_montgomery_performance32qp1.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/gfDVjeR/mogivewarunarakad.pdfIn PDF document text
    • https://cdn.sqhk.co/tokebamojos/f6Cjfid/steel_weight_calculator.pdfIn PDF document text
    • http://urologo.store/ava_max_all_songsh5y2s.pdfIn PDF document text
    • https://talidifixuj.weebly.com/uploads/1/3/5/3/135390844/zogididupopab.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/wiwamoxamo/agar._io_mod.pdfIn PDF document text
    • http://fupofew.epizy.com/animate_cc_software.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/taninopixotunebeli.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/27100476684.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/kokefovekagebigefe.pdfIn PDF document text
    • http://gabitotedusaled.epizy.com/wimojiwanoloja.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDED 3396 bytes
SHA-256: 9542a116d138b265c4882f9113d19e3c4f43916f31be220c94b7e8e87dc6e563
font_01_sfnt_off0000ea13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA13 5756 bytes
SHA-256: 6c6323353928c1dd3deafbd9c564da10dc44a9537e732cf964bc4ac1042b34f5
font_02_sfnt_off0000fd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD91 10480 bytes
SHA-256: bf294b38a8177b5a2a41fb3269f6adc483707c2ca20c03e583cf1539848d1987

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