Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9692056454a396e…

MALICIOUS

PDF

97.2 KB Created: 2021-05-17 09:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: befaecc0c527b565291ad56dd94a4f91 SHA-1: 400fa9d21e015948946f71736e81503a0b398d20 SHA-256: f9692056454a396e34465349857ffff10504ec7ad8db9bf31ea2f7664c722bd5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure for movie downloads, which is a common tactic for distributing malware or conducting phishing attacks.

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
  • 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://golowaki.ru/strik?utm_term=johnny+depp+don+juan+demarco+full+movie PDF link annotation
    • https://rirulejirosajis.weebly.com/uploads/1/3/4/3/134320684/4c80d59548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392666/normal_60372bffe5dcc.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/hhijOjj/wilemasegepifines.pdfIn PDF document text
    • https://jaluzirilunotu.weebly.com/uploads/1/3/2/6/132681851/8269490.pdfIn PDF document text
    • https://josabinisepev.weebly.com/uploads/1/3/1/4/131452942/zefumimopiwisa.pdfIn PDF document text
    • https://fiwetoki.weebly.com/uploads/1/3/4/2/134235589/c67d5d3.pdfIn PDF document text
    • http://cetop.xyz/ratijusoxirutazimulofy12pd.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://roriwemako.weebly.com/uploads/1/3/4/5/134599113/eda681b21f.pdfIn PDF document text
    • http://qunit.space/dokutujifilumusoxutiwenr027d.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/cavjaml/communication_merit_badge_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/Fhiepgi/kugunanozuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/1lTVshd/vawetujala.pdfIn PDF document text
    • https://cdn.sqhk.co/toriwogadej/if9Hwgf/ataxia_cerebelosa_sintomas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411479/normal_5feaf1f96fe65.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/agenda_fiscal_2019_descargar30uf6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e24ff460-1725-4b9d-a7de-f8438c38fea0.filesusr.com/ugd/366850_96ad0ccb427e4e68a933f27f8f714c36.pdf?index=trueIn PDF document text
    • https://7b806e58-2e0f-4c22-b5e1-e0f71c4d6e86.filesusr.com/ugd/8da65f_64b59723df5a444496905ba45d39f733.pdf?index=trueIn 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_off00013669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13669 5444 bytes
SHA-256: 0b79c07288186849173bc55299586feb7380f87224cc7a4db8625d72c557062b
font_01_sfnt_off000148dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148DD 14112 bytes
SHA-256: 396ba033ec57ee844d21986de8547a7f7f0dcffdb303aaf0da92a70666bda180

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