Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b322a300bd1f3e8…

MALICIOUS

PDF

79.3 KB Created: 2021-02-20 01:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1962a6562349fe9afd5d214185053d1b SHA-1: c3ba80796f73cbb7b643826aa29a8ad5e6224a2e SHA-256: 9b322a300bd1f3e849da4ef972eed2035c1d8376d97f0c4313c42c2c09676b0b
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to disposable hosting services, and one directly to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to gaming content. The primary function seems to be directing users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=xanathar%2527s+guide+to+everything+expanded+racial+feats+pdf In PDF document text
    • https://rakositove.weebly.com/uploads/1/3/4/5/134595637/bozifasumujevus_zupisekiju.pdfIn PDF document text
    • https://vukuzimina.weebly.com/uploads/1/3/4/1/134109202/3235531.pdfIn PDF document text
    • https://pasuwuzo.weebly.com/uploads/1/3/1/4/131438486/kitikupo.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwonukunav/jg5OjbS/14576860268.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/EQhbjcG/xfinity_prepaid_box_phone_number.pdfIn PDF document text
    • https://foravidamekog.weebly.com/uploads/1/3/2/3/132303307/733c6f42e455c.pdfIn PDF document text
    • https://jabevemejo.weebly.com/uploads/1/3/1/4/131483275/7949919.pdfIn PDF document text
    • https://purabadixubemik.weebly.com/uploads/1/3/5/3/135399060/funopekadotiz-wanotumaku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451929/normal_6004ea13639a6.pdfIn PDF document text
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/zilatotasakof_lajujinixiwa.pdfIn PDF document text
    • https://zetovesejideze.weebly.com/uploads/1/3/1/4/131482946/2d6395ca.pdfIn PDF document text
    • https://texexodova.weebly.com/uploads/1/3/0/9/130970004/e6bf8af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427076/normal_60261c1917958.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/h3jenCA/tovewuwolawozezisofederes.pdfIn PDF document text
    • https://pobufulali.weebly.com/uploads/1/3/4/4/134494274/vawipikamatezukiga.pdfIn PDF document text
    • https://cdn.sqhk.co/gedofovel/hjAtFDU/gelebusodinemofi.pdfIn PDF document text
    • https://runeburagaxe.weebly.com/uploads/1/3/4/6/134699488/46866.pdfIn PDF document text
    • https://cdn.sqhk.co/wemowubire/y5hbUD3/powodarovokelidepidaf.pdfIn PDF document text
    • https://cdn.sqhk.co/gowozepugax/ahaVghl/wordpress_website_design_cost_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70C 5660 bytes
SHA-256: 9be8426803ec3701fb6a83f99b9320b9b7c701d37a930bbf07fd0c7139bb15da
font_01_sfnt_off00010a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6A 11120 bytes
SHA-256: f5362a85d0077e2b0933c2b2e6f100c44ef448c2ee84c36531c095b250d9eb07

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