Malicious PDF — malware analysis report

Static analysis result for SHA-256 570df01b4394c5b8…

MALICIOUS

PDF

83.4 KB Created: 2020-12-16 12:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 44347f833bf5ab3a613d4db50dba3428 SHA-1: 84b9ce7137879c4e2bdf0d6776cc36881c05a435 SHA-256: 570df01b4394c5b8d3edd24e3a2fb6995d328e307e143ada40d26731e3d3e94d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with heuristics indicating a link farm and a redirector to malicious infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or SEO manipulation to drive traffic to compromised sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=nombre+de+animales+en+ingles+y+pronunciacion In PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/3136970.pdfIn PDF document text
    • https://kokejegifuro.weebly.com/uploads/1/3/4/4/134477846/2606688.pdfIn PDF document text
    • https://melenoradu.weebly.com/uploads/1/3/4/3/134340649/buvexufen_xapigiw_zubaluvomak_vizagotebolopom.pdfIn PDF document text
    • https://rexekimat.weebly.com/uploads/1/3/4/0/134017736/nulufivovejuwu.pdfIn PDF document text
    • https://gekawemugib.weebly.com/uploads/1/3/4/6/134623466/3563743.pdfIn PDF document text
    • https://vokudaminovisuz.weebly.com/uploads/1/3/4/4/134495340/gezevokotono_surejemulo_zozokomixilipo_kajafowodenoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479214/normal_5fd6d191e40e4.pdfIn PDF document text
    • https://jigulukeduza.weebly.com/uploads/1/3/4/5/134508725/d51f75843a2b7a.pdfIn PDF document text
    • https://petugureb.weebly.com/uploads/1/3/4/4/134445868/f9be70b537e6.pdfIn PDF document text
    • https://nebomigefut.weebly.com/uploads/1/3/4/3/134359696/fa8aa.pdfIn PDF document text
    • https://vafuzetok.weebly.com/uploads/1/3/2/7/132740798/raguxigonax_kojak_zufinawejo_joxav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc781772122570d580291d1/t/5fcc290074a40730fb89efd4/1607215361353/hill_climb_racing_download_for_pc_windows_10.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ded9579eee3ae06a23cc/t/5fcca8b52bc7884852b089da/1607248056467/kedasodifavis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d0d9e5c7695ca9a82108/t/5fc3f9a2a97599144e734ba2/1606678946397/bopotonarasepiwa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce78d84db91f551566e8b0/t/5fd20c27d97b572b89e05692/1607601198499/instagram_app_icon_black.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80F 5604 bytes
SHA-256: d669d7c450dcd12a95be404c8e575e0134c5ec9fa505e6a890a4e73f5804ba1d
font_01_sfnt_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 14444 bytes
SHA-256: 3066f26cf276cbb2d12cea0a3c4ee321343f5fa8d47ded07f79dc075717c19c0
font_02_sfnt_off000128fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FE 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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