Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7e187b252f22e2…

MALICIOUS

PDF

71.0 KB Created: 2020-11-18 07:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a59a15d388d3af380d126fb34025b38a SHA-1: c196f45ff4213a520d1ef06166ffdc75c56b0aff SHA-256: be7e187b252f22e29f08bae4f69e0472e18f1cbe9e1a52889fd3a2e0129d29f3
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded URL 'https://trafftec.ru/123?utm_term=real+followers+for+instagram+apk+2020' indicates a lure related to Instagram followers, likely a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://trafftec.ru/123?utm_term=real+followers+for+instagram+apk+2020 PDF link annotation
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/narisatesepujiv.pdfIn PDF document text
    • https://dajolulozofupo.weebly.com/uploads/1/3/4/6/134634221/2265179.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/5305658.pdfIn PDF document text
    • https://delutezebojuk.weebly.com/uploads/1/3/4/3/134353455/kokeletowikizok-zitulaxogove-zonesek.pdfIn PDF document text
    • https://xolawawasaxigu.weebly.com/uploads/1/3/4/5/134587427/4663148.pdfIn PDF document text
    • https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/1990190.pdfIn PDF document text
    • https://belafawejogawol.weebly.com/uploads/1/3/4/5/134583754/9074411.pdfIn PDF document text
    • https://favasebuwakule.weebly.com/uploads/1/3/4/3/134328846/mofedutekituxeb_migufegejibo_durazemiguxikag_joruwosarap.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/lafimojole.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/2c1c73aad3f9.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/lisezifuvogam.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/pubopelej/math_giraffe_slope_intercept_form_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/xofidilanazoxup.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/performance_standards_for_antimicrobial_susceptibility_testing_2019.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_off0000d877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD877 5660 bytes
SHA-256: 1e16f8fc44e36024f83ba3dbb44ea0c9da0a7c31c099dec663908a34372e37db
font_01_sfnt_off0000ebc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC1 10400 bytes
SHA-256: d798bb64f43eea94016a99079a24d65b594b293c9130df18003a7eccd31f7085

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