Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10cd36173f82179…

MALICIOUS

PDF

71.4 KB Created: 2020-12-22 00:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 464cb36e785173a272b216c67607e52c SHA-1: 98b90cbcfbfd298b132022f854b4ca4492a48a46 SHA-256: c10cd36173f821791f84f760f27310b180883055f40777b6f15a63b248993590
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it's a phishing lure related to software downloads. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing malware or phishing. No scripts were extracted, but the presence of a redirector URL points to a download or phishing attempt.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/aws?utm_term=blender+full+kuyhaa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384316/normal_5f92bfad3f4e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5f8efcc17a579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445749/normal_5fb846df150e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446772/normal_5f9f06b4cee28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383699/normal_5fcf5b1fc766d.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/deece8dbd8fb1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406776/normal_5f9728ba9defe.pdfIn PDF document text
    • https://wunobenera.weebly.com/uploads/1/3/4/8/134887230/zojuwo-venul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5fb46218743d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_5f907902d675f.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/sorogamat/tafsir_zilal_al_quran.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/free_physical_education_powerpoint_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/dubbed_movies_tamilgun.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/15296432772.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 5032 bytes
SHA-256: 4c673e657f027d3fa9317f39cbe7b77db897dabcabe27f41fbd8431bf12836b6
font_01_sfnt_off0000ebe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE6 10756 bytes
SHA-256: aca0ca853d779f9ecf2ea8f77e72c8f4feed7aefc96d33967f49cc4595895763

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