Malicious PDF — malware analysis report

Static analysis result for SHA-256 3110c4bf5dc52fa0…

MALICIOUS

PDF

106.7 KB Created: 2020-12-16 18:59:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7a2e63af04fd4da1eda2f3700b9285d4 SHA-1: 08372bdf74fc3ddef84462125f28b540fe637821 SHA-256: 3110c4bf5dc52fa0d6d5d310ea35bcaeab8b978e6413b3aa440e9ad3bb196fbe
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://traffnew.ru/aws?utm_term=2008+bollywood+movies+list PDF link annotation
    • https://xafozidej.weebly.com/uploads/1/3/4/6/134643925/6351454.pdfIn PDF document text
    • https://tibaxasunoz.weebly.com/uploads/1/3/4/5/134589804/zovunixutosene_wefapupev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446015/normal_5fd380bf8e383.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/narolitefiz_gasapatasoda_mepenitaxux_nivegituju.pdfIn PDF document text
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/nabovax.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/8e5f1db6-5bb9-4a6a-9952-de7af5a0cf38/49322175694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4051be24-e723-47fb-909d-43c5158ef061/lizoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d22e71-66e6-4d8c-8d32-90519664b4dd/algebra_lineal_uniandes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db79279e-6c40-463e-ae5b-c768202725a7/90979861884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b225dbd-8fb7-4671-aaae-137087586286/cincinnati_music_festival_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7991fd32fb7060d12c8d1/t/5fcaf8f336758319a54a65f4/1607137524416/female_soccer_kicker_nfl.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_off00015ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EF9 5432 bytes
SHA-256: 9a7428c27bdfdb3fa95852a2627b577da77d90f9ff0ed0b05c385326f562b87f
font_01_sfnt_off0001717c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1717C 13232 bytes
SHA-256: f00fffbc37a5fb7ac3af9b59cdab0dd6a7c41846f75121ae0db14a9d2c39c9a6

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