Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfcb8788065b8761…

MALICIOUS

PDF

34.5 KB Created: 2020-11-06 05:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5853d5087c87a569e11de36cd76c8452 SHA-1: d50ffab82a2ffc299fdea5076f1b4e2fa155fd65 SHA-256: cfcb8788065b876120c3737383c25347270e92499993e0719618a53b88fb2304
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://traffmen.ru/123?keyword=movies+in+southridge+charleston+wv In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_5f9b76b81c503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5f90ab389561e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_5fa463021766d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/goporo/97600620113.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/dirt_bike_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/dakafiximufoserufowowen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d58e30-23cc-4210-bfee-44b3725a9386/50871208633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e1f3869-f392-446f-b83d-707ac906e237/karivumajopefil.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/misober.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/battle_of_khandaq_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/832494b9-b16f-4062-bdce-6c82ed8ce09f/73650787005.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/fundamentals_of_engineering_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/progress_index_obit.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/george_s_marvelous_medicine.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/full_and_final_settlement_letter_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/rivezexivasexura.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_off00004683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4683 5360 bytes
SHA-256: 2b56faedd208aeda4966429cea9fc1a1e6219d5ceb7447179cb215211cc8d3db
font_01_sfnt_off000058d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58D6 10172 bytes
SHA-256: 071bf6442b6904799e5007665722cfab5d8e95c84140ec4a55bc506923adcc16