Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a704eb943bd966d…

MALICIOUS

PDF

68.0 KB Created: 2020-12-09 22:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b4b458acf8fa4c3254dba15296c534f6 SHA-1: dda9d76f332e16ef243d5c68ae47776eb9128b08 SHA-256: 9a704eb943bd966d6c17e7f29a9ced4a0918b9ab91c36c7cb03b456f46dadc88
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://trafffe.ru/123?utm_term=ankita+dave+video+instagram PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375071/normal_5fcd306291d23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449000/normal_5fb616c193d04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371514/normal_5f9187a920762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5fa1feaced99b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_5f901e51e24b1.pdfIn PDF document text
    • https://lutilaxo.weebly.com/uploads/1/3/4/5/134599665/mexakukivewa-manovirumegeke-megunetikuzen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5fa4e1d393e7e.pdfIn PDF document text
    • https://ruzunaxatan.weebly.com/uploads/1/3/4/3/134340268/tuniduk_lanodanelewoza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc51e66c14dfd36fe0cdc92/t/5fc992b42ae1264a038aaed2/1607045813421/50032714034.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc284201c8c7413143c29cf/t/5fd0678da91a8d24337a570b/1607493518478/falling_in_reverse_lead_singer_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc72dfee9133927d90d8985/t/5fcc7e009aa2de0c648c7aac/1607237123482/tejazudo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6690c9955c744b5610b9b/t/5fcd45bd260a660a6be89f64/1607288261087/bopupat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d44d2e-e3c9-48f9-a6f7-25081133c8fd/lapolamawikowatolebexepo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b11f403f5353fdb64fcc/t/5fc6a16f3c6ccf69f348cfa4/1606852975998/arcade_games_online_free_no_download.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_off0000cc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC59 5228 bytes
SHA-256: c8cd6188cecba40d80b5f4c81781b5634943974d6d50e3a1280f521ba0f731ab
font_01_sfnt_off0000de1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 10920 bytes
SHA-256: fd8f9a3d98a97876c0695270ea706541aac4278f5b51caec6774e182e98ca619

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