Malicious PDF — malware analysis report

Static analysis result for SHA-256 e554350423354483…

MALICIOUS

PDF

72.9 KB Created: 2020-11-13 07:59:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2939cdcd9448ef3f425110a6f1575410 SHA-1: d5f738a94450889c330b0c669ab438f09895d540 SHA-256: e554350423354483dc5184da671d921623e8ab2f52a0c8b493424e578ec6bb1a
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 0.9998

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://trafftec.ru/123?utm_term=visual+boy+advance+apk+download+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408187/normal_5fad52689b9b9.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/8938415.pdfIn PDF document text
    • https://bivitomelonex.weebly.com/uploads/1/3/4/4/134491730/a6e23aaa188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5f8a012775509.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/tetuwibo_wuvur_poxafod_kibonawukiwije.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wewebunovemerifabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388406/normal_5fa093a97b03a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5f9357ed796a8.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/90e492af-b9ec-4942-a65a-28ed1a5b2b96/38185001280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce912b4-5425-465e-b016-93e7bfb10987/tadosogalaboromezareluk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb57eeb1-cf57-4376-815f-71a3da0c992d/pokemon_omega_ruby_delta_episode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/895868af-ffdd-4810-8cf9-8c54d3168a6a/singer_7422_manuale_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40bd7c2e-b7b7-4526-a397-43f614253fbe/46068379140.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC612 5572 bytes
SHA-256: 1e0bf74705b6705f6691994a9a592badc914744104f6142650c0239962d5f337
font_01_sfnt_off0000d92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92F 11160 bytes
SHA-256: 9b53bfbd0a322010196abde5434a49ff7af63ed1ce23347f3557baffcf484894
font_02_sfnt_off0000ff38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF38 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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