Malicious PDF — malware analysis report

Static analysis result for SHA-256 6584ab9a3c0b1d11…

MALICIOUS

PDF

68.7 KB Created: 2020-11-10 14:47:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5d5608b20852751f42c3d60d4a5295db SHA-1: e5094ca3628e5ee6ea0bc948c1ec6d29aa873eca SHA-256: 6584ab9a3c0b1d118a6ee2d0d13c24b9d29acbe836525ce887c524882fd99158
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 0.9997

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://traffnew.ru/123?keyword=san+felipe+maple PDF link annotation
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/70ac75af556999.pdfIn PDF document text
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/vurobis-xirevanukabibuk-mewimazeso-lemixerovij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5fa5178d27845.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/8b92a0d095201ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/html_file_to_javascript.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/jifojupego.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/wojoriravetelumida.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/zuzufuseganeworexixi.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/43103107313.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/small_converter_to_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/anemia_dieta.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/23178926211.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/odisha_assembly_election_2019_date.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57B 4472 bytes
SHA-256: a7970e21f957af4df86635b4694d604f9e9735132d25b0988ec9b114acfa487c
font_01_sfnt_off0000d47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47F 10384 bytes
SHA-256: 710f3c87c94d1c2f87833496e569730be72f8d3c9cc52d83f1b620039319d76d
font_02_sfnt_off0000f7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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