Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f4cbb6d2313511…

MALICIOUS

PDF

59.0 KB Created: 2020-11-22 03:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6ae83e66f13986270ec962674a21a47f SHA-1: 25069664f482ec3b51b9dc277021ba045a78765f SHA-256: c7f4cbb6d2313511ce5bd21a8eb5aab3e2b68b39930af73d7b220fb28e6798ad
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://traffnew.ru/123?utm_term=kenmore+humidifier+manual PDF link annotation
    • https://buxipowuno.weebly.com/uploads/1/3/4/3/134353207/vebofufobefiw_dilik_lemisibotiponi.pdfIn PDF document text
    • https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/6103699588932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5f93e8d5e7ade.pdfIn PDF document text
    • https://zupudawuliwubil.weebly.com/uploads/1/3/4/2/134265939/998112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474759/normal_5faff5e65d64c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f889ee27f8c5.pdfIn PDF document text
    • https://newejata.weebly.com/uploads/1/3/3/9/133999860/539d8a7672719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_5fa44bc9abeff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f897f06a3492.pdfIn PDF document text
    • https://xofadezonav.weebly.com/uploads/1/3/4/6/134643644/radole_wutaw_tazudalanopuse.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/perurulexi/97912975548.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACA0 4936 bytes
SHA-256: 95edeffecd4ba5b5a50e05488b3c0afc34df945759c3f2c5cc76be45e542b5a8
font_01_sfnt_off0000bd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD40 10060 bytes
SHA-256: e0cd980f6945bd86a7a8ea5b0ca9efa37f0e914ce3e924e91a78251a95a1cc30

Open this report in the interactive analyzer, or submit your own file for analysis.