Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96b9ef664e8939a…

MALICIOUS

PDF

68.1 KB Created: 2020-12-20 09:13:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5ca0dbbbf2eeda961422ad8652de152b SHA-1: 12f927fd0bdc2caea940387ddbc7a34dcf2e1810 SHA-256: f96b9ef664e8939a2965b62c7d815c9b178ddc8f56c3efe3edce8db5072257d3
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/strik?utm_term=manchester+nh+mall+apple+store PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488336/normal_5fbcaeebc6667.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/52b418.pdfIn PDF document text
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/4461080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f8782ce5ab14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5fd14eb6d58db.pdfIn PDF document text
    • https://xoxigukot.weebly.com/uploads/1/3/4/8/134861038/4566831.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aae6b904-6edf-4e70-92e5-f0145af09d84/fetodepafaxixasav.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c781c89b935f15ddc3c4/t/5fd68e247fc52c20692b964e/1607896612932/65654913514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f83d8483-5bff-47b2-ab69-47b873bc8b4b/jejolebidujazosomigeperu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1572efbd-5551-4bf7-8c29-953fe040d432/zirugep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1b7cf0-d59d-4192-bfb2-063bdc7cfe44/motor_de_induccion_casero.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c6ec2bbd74065827f47b/t/5fd635fd154d727871e58033/1607874046053/tadaz.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_off0000ce9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9C 5180 bytes
SHA-256: 303c630f82db5f6590d5a20fa221c117d20b720ad71600159f9d534f4d4ff90a
font_01_sfnt_off0000e015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE015 10408 bytes
SHA-256: bceff8093b725298b575722b5b879fb0d601e75920b419d2cc8e9036ee9c10c4

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