Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80ec8ee1911a44d…

MALICIOUS

PDF

69.6 KB Created: 2020-11-21 19:38:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b87e9e69fdc2334178fb285314570e7c SHA-1: d34f8fed08aa194b70fdd8a1570bdd25f171ddc3 SHA-256: c80ec8ee1911a44d925882a48f6e4bef198d36f02ee93fcbbe4dc598881289e4
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. One of the embedded URLs, 'https://trafffe.ru/aws?utm_term=foxit+reader+m%25E1%25BB%259Bi+nh%25E1%25BA%25A5t', likely serves as a redirector to a malicious site. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/aws?utm_term=foxit+reader+m%25E1%25BB%259Bi+nh%25E1%25BA%25A5t PDF link annotation
    • https://nagifinapu.weebly.com/uploads/1/3/2/6/132696111/09f5178d2.pdfIn PDF document text
    • https://ganizosu.weebly.com/uploads/1/3/4/4/134434359/7d6c8e5e405866b.pdfIn PDF document text
    • https://zisifogadudup.weebly.com/uploads/1/3/4/7/134765868/9954963.pdfIn PDF document text
    • https://silemixijotin.weebly.com/uploads/1/3/4/4/134463531/2039240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5f9aa51e583b7.pdfIn PDF document text
    • https://gusizamavuva.weebly.com/uploads/1/3/4/6/134629738/lososol-vajesu-zikuwaku-rugikez.pdfIn PDF document text
    • https://revejoduxu.weebly.com/uploads/1/3/4/2/134266419/lapeduwuxojulidine.pdfIn PDF document text
    • https://bidutujube.weebly.com/uploads/1/3/4/4/134403342/3527718.pdfIn PDF document text
    • https://namunobuwuper.weebly.com/uploads/1/3/0/7/130776476/6208526.pdfIn PDF document text
    • https://gotabidulubawob.weebly.com/uploads/1/3/4/7/134723529/81e40131a.pdfIn PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/756c3f.pdfIn PDF document text
    • https://nabolonoroxene.weebly.com/uploads/1/3/4/3/134373159/jugoli.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/pulavokaxe/kivitogipa.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/amortizacion_de_prestamos.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/ahmedabad_auto_rickshaw_fare_chart_2018.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_off0000d3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E1 5304 bytes
SHA-256: 5a49398733de0f6e6452611f1ff3bcdf06a4f7a065eb50037b9a3ba9ebbb0c0c
font_01_sfnt_off0000e520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE520 10164 bytes
SHA-256: 84748d9c9aacceb63557d8bf7c8ea2782d17bccf73f5c4798c6f08fa599a23e7

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