Malicious PDF — malware analysis report

Static analysis result for SHA-256 192c510f6846855d…

MALICIOUS

PDF

71.6 KB Created: 2020-11-17 23:26:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bf9b9580abb3fba0c66ab23f1fef7801 SHA-1: dbfc84836e8e8b6fe11a4feafad11a95c5468d43 SHA-256: 192c510f6846855dbd0824581f989ef5adeef09d68975b53c9db6273c68fb616
156 Risk Score

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 0.9995

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/strik?utm_term=pixel+3+manual+focus PDF link annotation
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/0a767e5f6b29.pdfIn PDF document text
    • https://nasefowiwawenug.weebly.com/uploads/1/3/4/1/134109082/d6fe08f.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/5963948.pdfIn PDF document text
    • https://sajogosekatoja.weebly.com/uploads/1/3/4/6/134682383/figekutojalis_widonajireko_sumeb.pdfIn PDF document text
    • https://madudezogimune.weebly.com/uploads/1/3/4/3/134326665/toxodejezufuvomav.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/b5a160a1-0b32-44ec-9555-bebc4f17a931/taluseweso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2329e5-8f2e-4dc9-8ef8-d0713366d6d3/15757994314.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/red_cross_clubmobile_life_magazine.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/branches_of_soil_science.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/acela_express_price_philadelphia_to_new_york.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_off0000daee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEE 5164 bytes
SHA-256: 9372c1b41e5f40e2493e8dfb125068240a5a1e89982202d6b60bb7832f90c2c0
font_01_sfnt_off0000ec7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7D 10996 bytes
SHA-256: d791e3d9ced5644a33909d29c89ec574eb96089369668345d2ffa7768693c3d8