Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ae33bf96fd36bc…

MALICIOUS

PDF

78.5 KB Created: 2021-02-28 05:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b82ae0cc07095dc9c5ac09801cc1e4db SHA-1: ee4645c92911bbb73646f3ce6e243bc2a1f0925a SHA-256: f1ae33bf96fd36bcbcbb4fff8107f57695df78ba388ebcbd889e47a9f478585c
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The document body, though heavily obfuscated, contains text related to 'how to write a tv script uk', which is likely a lure to direct users to malicious URLs. No scripts were extracted, but the PDF structure and external links suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/award?keyword=how+to+write+a+tv+script+uk PDF link annotation
    • https://bazigumaxofiz.weebly.com/uploads/1/3/5/3/135383162/4113541.pdfIn PDF document text
    • https://cdn.sqhk.co/xejadukoxeta/Gge7ggd/gekonodo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392651/normal_5fce9e1fcd790.pdfIn PDF document text
    • http://bokubewere.22web.org/liwifi.pdfIn PDF document text
    • https://cdn.sqhk.co/japewaturu/hhRKrha/cthulhu_virtual_pet_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5fd3d600d59d4.pdfIn PDF document text
    • https://bulasenojagaroj.weebly.com/uploads/1/3/4/3/134357248/5429466.pdfIn PDF document text
    • https://vogavowaxataner.weebly.com/uploads/1/3/4/2/134266619/9444141.pdfIn PDF document text
    • http://fafezav.iblogger.org/what_does_z_star_mean_in_statistics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416935/normal_5fcf82d3bb0e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449974/normal_5ff202016a63d.pdfIn PDF document text
    • http://momexatajuma.22web.org/63066329051.pdfIn PDF document text
    • https://zetakopazo.weebly.com/uploads/1/3/5/3/135351561/wajarimewedeziro.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/HiaHFW5/project_human_resource_management.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://votitagupen.epizy.com/cara_vlookup_excel_beda_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/kuwidak.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/xunolapojetetisit.pdfIn PDF document text
    • http://rakimeramut.epizy.com/jufegerin.pdfIn PDF document text
    • http://kogisovaf.epizy.com/rububivixozomelexodizon.pdfIn PDF document text
    • http://pimeduzuruwoboj.rf.gd/sodig.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/pewepufukutem.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/bozana.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_off0000f734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF734 5072 bytes
SHA-256: 80eade5543c9fed33e61ff20231c5f10187348ce8706200b1dc00244b3ade336
font_01_sfnt_off0001089d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 10432 bytes
SHA-256: dd72ad1ab43b8a7688fbc502e8266072e2a98309c339b242c74428b2b88f97b0

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