Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db10e3e2b815861…

MALICIOUS

PDF

76.6 KB Created: 2021-02-22 00:19:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5db39362ffe1925e23ff57a7f16d81ba SHA-1: 6fed83de6184c969633e1ed755ebe1c1a71ee6eb SHA-256: 5db10e3e2b81586151ae0c4598769ff0a82c07777221bd09eb4011672d612ad0
196 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document attempts to trick the user into installing a browser extension or update, a common social engineering tactic. The presence of numerous external links, including one pointing to 'ratadipemor.epizy.com/luzala.pdf', indicates a link farm designed to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://bologen.ru/wix?keyword=carrie+pdf+free+download PDF link annotation
    • http://tosasex.22web.org/43898963642.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421767/normal_5feb5dd8376bb.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/gidap.pdfIn PDF document text
    • https://medogizelolu.weebly.com/uploads/1/3/1/0/131070938/nowoxili-wevibogasupe-kidaribosulu.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/3276486.pdfIn PDF document text
    • https://somokowu.weebly.com/uploads/1/3/1/3/131383604/pebuzisolavutiwigewi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470412/normal_5fe36ee07f470.pdfIn PDF document text
    • https://zalivibutadugaf.weebly.com/uploads/1/3/5/3/135391941/a18fc7.pdfIn PDF document text
    • https://fikobovivinuzo.weebly.com/uploads/1/3/0/7/130739062/2168091.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/aLhfhfA/13712815877.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ratadipemor.epizy.com/luzala.pdfIn PDF document text
    • http://ligunatiresid.epizy.com/18925705801.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/simple_harmonic_motion_physics_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/sisenawuzedu.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/nupijazesolevofazopajof.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/lezozani.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/free_email_signature_template_word.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_off0000e27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27C 4680 bytes
SHA-256: b0808ddcffba10c6664ce86b21a2849603a455c686b6f38c87a471c206580172
font_01_sfnt_off0000f282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF282 10740 bytes
SHA-256: 05dd9cb169d1ae3a02f8dfd207422ef675621efa30e8df3368337ea9e58aec23
font_02_sfnt_off0001174c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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