Malicious PDF — malware analysis report

Static analysis result for SHA-256 37f036bf2e05f5ed…

MALICIOUS

PDF

64.1 KB Created: 2020-11-11 08:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 29bd293f71f89abcf44b1cbd3431a03b SHA-1: 2b831d0da3dd2cdb67dd1bebb5765d532600638a SHA-256: 37f036bf2e05f5ed93cb9e444a32a8f717c9005499944ab9669fe615487cc9c7
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://traffnew.ru/123?keyword=google+classroom+ccsd+login PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5f9b84ebe3b61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f9a6c29092e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_5fa78e75ad2de.pdfIn PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/dezem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_5f9e76df79e9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_5fa4064197397.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/4743978.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392199/normal_5f972c84dd612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_5f94df97c84ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417046/normal_5f9a956a1e9b6.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/9fc4313a-9db1-4db2-958c-0d222b3c0e22/47874646256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/127f5607-511f-4439-b5fa-709a5ee6ea40/fojemumevozilazumexuletis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25dfed92-04f5-4601-93b5-97631c283aa3/cprp_study_guide_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/913005ad-8964-42f7-a049-5538bc0483b5/72292400665.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 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC2 5292 bytes
SHA-256: aab7c2e4860b8d96fc198a39656e59b0c07e62d39d746d64e5f8696d271aaf8f
font_01_sfnt_off0000cead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAD 10900 bytes
SHA-256: 781191c16e2ad364cf33574b45d13642c98496f90a4831c2a4499d164e5dd346

Open this report in the interactive analyzer, or submit your own file for analysis.