Malicious PDF — malware analysis report

Static analysis result for SHA-256 927c5f2f97dfabb8…

MALICIOUS

PDF

66.4 KB Created: 2020-12-04 19:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 724345a47c9ff3dacde88e29991e8a93 SHA-1: d8a9a5a4a9b304ae850f4e83f7d7e8064742e97d SHA-256: 927c5f2f97dfabb803d048e62e0f8850f198351ad9108742b4e7130fe352d79f
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 0.9996

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.
  • 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://trafficel.ru/123?utm_term=sansa+media+converter+mac PDF link annotation
    • https://xisudujerixaxir.weebly.com/uploads/1/3/4/5/134583325/383d02b39.pdfIn PDF document text
    • https://roneresikixa.weebly.com/uploads/1/3/4/4/134476702/togesimuvuv.pdfIn PDF document text
    • https://firaxefa.weebly.com/uploads/1/3/4/6/134694685/3746320.pdfIn PDF document text
    • https://ruxikejogotiwo.weebly.com/uploads/1/3/4/5/134576655/wojaxezunijas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5fb2bcd83a06c.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/2d0ac123-d82e-40dd-a6e5-e3da6017e876/sonic_blade_knife_replacement_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa56064-8a57-456c-9dc7-e4279173285d/liftmaster_41a4252_7d_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71111eca-8f62-4f06-97b8-d8bacf2a2751/auto_parts_48629.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/rotf_discord_server.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05fdf182-1087-46ef-b386-89674f490af2/mulan_1_animasyon_tC3BCrkC3A7e_izle.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_off0000c4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C9 5216 bytes
SHA-256: 6676f63fb57c6f69f96a5d8ed27bb8a8b18b4cf66513db56769f38231b5b74db
font_01_sfnt_off0000d673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD673 11288 bytes
SHA-256: f5d4e2fb2fab7fc16f2134ac0a6822d28e566b7adccd8c12a8e46ab0824d83e8

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