Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb4bdc2d850f309…

MALICIOUS

PDF

75.9 KB Created: 2021-02-15 20:13:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: e01e0752b9882be280b501a832d9046c SHA-1: 8404a59436d05e80c9cb5cac3d858ace1b992f41 SHA-256: 2eb4bdc2d850f3098242f3f708dbcc0ee58c991236155c7d1e8ec69457fb3c57
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, characteristic of a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the overall structure strongly suggest an attempt to lure victims to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=not+unique+table%252Falias+%2527users%2527 PDF link annotation
    • http://callup.today/eye_mp3_fulls8pej.pdfIn PDF document text
    • http://delaem-sami.online/whatsapp_gb_apkreal892w8.pdfIn PDF document text
    • https://fikifiwokadekaw.weebly.com/uploads/1/3/4/5/134585034/pirabibut-walamerimu-jovadase-birutozixudalu.pdfIn PDF document text
    • https://tekopazaxalar.weebly.com/uploads/1/3/4/3/134348639/8a5f592b610.pdfIn PDF document text
    • http://lnstagramcentre.net/persuasive_essay_outline_templatevcy89.pdfIn PDF document text
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/3356658.pdfIn PDF document text
    • https://mejonozawus.weebly.com/uploads/1/3/4/0/134016798/9587297.pdfIn PDF document text
    • http://hristogrigorov.com/devi_bhagavatam_telugu_freeleamr.pdfIn PDF document text
    • https://ninijaliwejito.weebly.com/uploads/1/3/4/3/134350726/rozalemojutin_kodafuvunanuf_laxamusukew.pdfIn PDF document text
    • http://lavkavkusa.store/22357151365xh1h2.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/1514789.pdfIn PDF document text
    • https://kibajalixil.weebly.com/uploads/1/3/0/7/130739780/4002999.pdfIn PDF document text
    • https://fojakodi.weebly.com/uploads/1/3/1/3/131379163/3549194.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sikejafomanama.epizy.com/xomoxozukokelotewubazur.pdfIn PDF document text
    • http://zijomofi.epizy.com/mosapazikutitusedomu.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_off0000e5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FD 4984 bytes
SHA-256: d148c94ab1a49017807d72959c06be3dd3012418be16ff2473ca09a16e1ac048
font_01_sfnt_off0000f70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70F 13820 bytes
SHA-256: 76d9740b507038db150cb1a021e32128b4180a8f9eb7123e2165595f9128f17f

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