Malicious PDF — malware analysis report

Static analysis result for SHA-256 2917cba33fde7954…

MALICIOUS

PDF

78.5 KB Created: 2020-11-19 06:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 69ca4350b2abf2aba5f3b5d61a30fdb9 SHA-1: d8b38ebeeb9f01e7fd26e11fc6078d73980fa179 SHA-256: 2917cba33fde7954138628c9a83861667b3b760dce027288a6f74126e017e568
186 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 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=google+drive+spreadsheet+link+to+another+sheet PDF link annotation
    • https://niritamin.weebly.com/uploads/1/3/4/4/134486676/febas-rabafidexeronus-vabimizifufe.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/dasetosapipaxuj-rasixosariwajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5f9318efd3347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5f954dc1c2497.pdfIn PDF document text
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/08002fd.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/lizosum.pdfIn PDF document text
    • https://tetobalowuw.weebly.com/uploads/1/3/4/5/134523757/nevoxakizadosun-jopibosaf.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/c66b17fb-8ddf-4073-8604-d715d39f921d/escritura_de_numeros_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/97771805291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2deb2289-f88b-431e-92c7-3c937402ab3d/julie_roskies_litman.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/933471582.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/vesopuzatudawa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7B 5376 bytes
SHA-256: e32445b051bee55f1d5f74c95036b9ea836827cc9a36e697e50f163c15759236
font_01_sfnt_off0000f0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C7 10628 bytes
SHA-256: e62634dc3e0476319048f91b12ea48164911563c03a98aa5af5cf05fa929dc50
font_02_sfnt_off00011578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11578 16708 bytes
SHA-256: 498d85532c331d8f86c342f6d0886d5ae8de8f816091f6361bca3483dfb29f9d