Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee08fc6e56ae9f21…

MALICIOUS

PDF

78.2 KB Created: 2021-05-21 10:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9a6c9ed3f1e43ae1c923f0169e176170 SHA-1: 297abb92753b549b726a2d42c94c9ffdb5303e6a SHA-256: ee08fc6e56ae9f21b26d89e232a01f8678f26bd77d3e0d71001d51a1178cdf05
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, including one pointing to a suspicious domain ('pelibifir.ru') with a 'utm_term' parameter suggesting a phishing lure. Heuristics indicate this PDF is part of a link farm hosted on disposable infrastructure, and ML/ClamAV classifiers strongly flag it as malicious phishing content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://pelibifir.ru/strik?utm_term=can+i+use+my+phone+as+apple+tv+remote PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404116/normal_6039cdf699580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465938/normal_606d388d581bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454684/normal_5ff28693b128e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419205/normal_6030e1e094744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_5fd6a74e7b451.pdfIn PDF document text
    • https://gozataxuwo.weebly.com/uploads/1/3/0/7/130740141/fobetozix.pdfIn PDF document text
    • https://guwidavimup.weebly.com/uploads/1/3/4/8/134893931/bd94e741c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477173/normal_601f99708c174.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/7a5d4511947457f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381997/normal_5ff161a443182.pdfIn PDF document text
    • https://wimatuzufuduwo.weebly.com/uploads/1/3/1/8/131871585/ef862090390a774.pdfIn PDF document text
    • https://resafuki.weebly.com/uploads/1/3/1/3/131398359/batafofesor.pdfIn PDF document text
    • https://poxanada.weebly.com/uploads/1/3/1/4/131483305/pirozipifov.pdfIn PDF document text
    • https://gajubunumokava.weebly.com/uploads/1/3/4/3/134341855/670207.pdfIn PDF document text
    • https://lezanaxowap.weebly.com/uploads/1/3/2/6/132696506/vubajoki.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/banula/17516313850.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/how_can_i_have_a_peaceful_life.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/modezaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/vetofasa.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/8108653852.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_off0000f4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EC 5128 bytes
SHA-256: d636c5348dca785f59574f7d435e003d95309be9a40c9c5d94deedcd4db014ed
font_01_sfnt_off00010638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10638 10920 bytes
SHA-256: 3d4de0f6a373b049da02788f8276fc0b6f7fb2c9acdf7682cc9b4ec5067e17d7

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