Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cbaf4669223c94…

MALICIOUS

PDF

69.1 KB Created: 2020-11-23 17:22:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: eee57487e24c0b37b6e4404b51fd64b1 SHA-1: 9f666efb0989af7081d4ae1c3e3ae237f24f7a43 SHA-256: e7cbaf4669223c9482cd85d52ec85cf5db476423b58ccaf36ea498530f049c42
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=principales+exponentes+de+la+investigacion+cualitativa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392854/normal_5f9c2b1c3cf33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5f8f6a387726f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_5f9f39abb58f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8a45538b1eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468871/normal_5fb566e96b820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_5f8f8f64d6cf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419626/normal_5fb28cbeb7d58.pdfIn PDF document text
    • https://vofutomafete.weebly.com/uploads/1/3/4/4/134463257/ac416393fe4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401989/normal_5fbb9f90a3dac.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/cb3a9061-1147-4e4d-b453-e05d6cafee62/jiragusil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c35df02d-6d9c-40ed-bf76-2a13acf07c5d/dookudu_full_movie_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ecefcc-fdbd-423b-bf31-5d5dbfa014bd/kavabu.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/contingency_approaches_to_leadership.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_off0000ce3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3E 5372 bytes
SHA-256: 84ddc8bf84cd9b372e9ced1ca0f124fa82ccf31291b5360ab03c95c063f8992e
font_01_sfnt_off0000e096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE096 11228 bytes
SHA-256: 68342069a656d3e01864817edede9144e8015c0635cae96437b2e17493917972

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