Malicious PDF — malware analysis report

Static analysis result for SHA-256 c060bc8ac8d4b697…

MALICIOUS

PDF

75.2 KB Created: 2021-02-11 17:04:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: df3269779eeb5d9c97bb94362adcb50d SHA-1: 67212aaefba1da998fb9e09f0eac20acf432d60f SHA-256: c060bc8ac8d4b6978fa9c4b51f343cdff034c1aceb27167aa65fafe5833ad093
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

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://jottigo.ru/wix?keyword=metric+conversion+table PDF link annotation
    • https://kutebebi.weebly.com/uploads/1/3/4/5/134528954/feeb8b4be32.pdfIn PDF document text
    • http://iceteas.space/xafufosixaferebulakutik6qq4z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5fe0a5baaab25.pdfIn PDF document text
    • http://blubadgehelp.net/tiger_zinda_hai_mp3_downloadv33sb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467945/normal_5fef52f7f266a.pdfIn PDF document text
    • https://fipugodegiposal.weebly.com/uploads/1/3/4/6/134687615/5430409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487431/normal_5ff34678c15e4.pdfIn PDF document text
    • http://tersq.fun/canada_passport_childhsv7a.pdfIn PDF document text
    • https://witaveju.weebly.com/uploads/1/3/1/4/131452735/e8745458f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445107/normal_6007558667b48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462681/normal_5ff02121b7875.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409606/normal_5ffe2057d1ec2.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/tarajix/pikowesazupip.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/passmark_batterymon_full.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/weight_watchers_tracker_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/lose_yourself_instrumental.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_off0000e24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24C 4996 bytes
SHA-256: 8638af6b9745570e9d6b66e4b6e3bb42474d1e0908e522861fdbfdac530f28c5
font_01_sfnt_off0000f36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36C 14544 bytes
SHA-256: 67ea25aacca9c83913dfb87f40a30210a84aeeb1bf5367d4fa8e5345cd0a423f

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