Malicious PDF — malware analysis report

Static analysis result for SHA-256 33fb08c15dc40593…

MALICIOUS

PDF

66.9 KB Created: 2020-11-10 19:16:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1cc4a30aaf2624499accbb8f4d1eb614 SHA-1: dd3abd5d902920680c9c851dfffa7e8e3406ceda SHA-256: 33fb08c15dc40593f040b4ac81b75f8dd1717e784640b8d4049476f2c6715cbd
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or scam document. It contains numerous embedded links, including one pointing to known malicious redirector infrastructure, and employs SEO link farming tactics. The primary purpose appears to be directing users to potentially harmful websites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?keyword=kaplan+mcat+organic+chemistry+pdf In PDF document text
    • https://puduragasesalot.weebly.com/uploads/1/3/4/5/134581755/mowarexatip.pdfIn PDF document text
    • https://fogakorix.weebly.com/uploads/1/3/3/9/133997140/7670601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415051/normal_5f9ea822d6238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f964b248377b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470843/normal_5fa6491a44537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_5fa0df9debeb5.pdfIn PDF document text
    • https://bevatisaxotel.weebly.com/uploads/1/3/4/3/134378436/debowo-vetugefadud-pezuvok-tibesowudoxeg.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://uploads.strikinglycdn.com/files/40c49faf-12ed-42be-9fff-9a5b562ded29/89351311715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3afc27b4-db1d-4fc3-9eb0-d45a1247d187/pythagorean_spiral_project_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5f529cc-acba-4519-9329-cbbb76e8950e/norizuranejuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f918b0b-8017-4961-9a1d-3e39fb01e103/14806496513.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/80316136597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf10a0d-71c9-402b-bed5-0b0c7e158b29/47952730205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa5c9c13-1c79-4bf2-867b-0aabf247a6b8/7896571506.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bacc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACC 5428 bytes
SHA-256: 6ed75a4fe1b2f2d551477e75201d85e47a11d91c4271663b197d4d3dafb5424e
font_01_sfnt_off0000cd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD14 10388 bytes
SHA-256: 211728bb18a262648e9d9a06852a6a4c5a19dabca7ed1280eb1712c7be69ddae
font_02_sfnt_off0000f09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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