Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9865a2d718bd5c…

MALICIOUS

PDF

69.0 KB Created: 2020-11-17 17:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a53b827d47a5a19344a024dbb4fcae0d SHA-1: e772a92a2c4b5124e2c9ece96ed16edb246da6ea SHA-256: ee9865a2d718bd5c1f71d8e36efde1186eb2b64cb97e97dcd5f0a8a25b8115bb
156 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 is flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to a 'Legend of Zelda level 5 map' to disguise its malicious intent. The presence of numerous external links, including one pointing to a potential malware distribution URL, indicates a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=legend+of+zelda+level+5+map PDF link annotation
    • https://solujokorox.weebly.com/uploads/1/3/4/1/134108712/6f3a3484.pdfIn PDF document text
    • https://nonuvatemex.weebly.com/uploads/1/3/4/4/134443968/ac40c89dcbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f8a30071f5a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f874d7b4a40b.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/henghuili-files/sopefabutomim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78051c8-0bef-41ae-a26e-7c8b9ee4ba92/xuzavugufuxofasefevowekam.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/zulomomopikozivekon.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/98601067974.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/61504440446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c33c7073-1156-4e05-8904-f1a34b092e60/como_entrar_a_la_deep_web_con_tor.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/workers_information_sheet_version_2.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/fanug.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_off0000d298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD298 5264 bytes
SHA-256: a6b0582588ff59fe8bd22c41ae0e468392610b222eb281bd5c4265aaad77a72b
font_01_sfnt_off0000e493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE493 10224 bytes
SHA-256: 879510396b749be74d238ed732fa02d3fb3da5248d7e5df7fd27b73d6a38d910

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