Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20ad33ed949161a…

MALICIOUS

PDF

70.3 KB Created: 2021-02-07 14:31:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8f1965ead8bc8e406cba10105123ba26 SHA-1: ec29e20c6bf90cb5386fbf2deba7fe9990bc9a7f SHA-256: f20ad33ed949161a29d49b15a19b9e72bf05fed6741c27518dc6f3c6b631e0bf
126 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous external URLs, with several pointing to disposable domains and acting as link farms, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URIs indicate it's intended to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=iwata+eclipse+hp-cs+needle PDF link annotation
    • http://austritkfa.com/adjetivos_calificativos_ejercicioso2cfl.pdfIn PDF document text
    • http://sun-italy.space/legedowasibenokizafarsxhrd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484363/normal_600858f0194f1.pdfIn PDF document text
    • http://tenakotete.22web.org/vowanalufuwawiza.pdfIn PDF document text
    • http://axecheat9.xyz/luduxezuzatv8fr.pdfIn PDF document text
    • http://netewe5.xyz/today_s_weather_forecast_for_chicagookxom.pdfIn PDF document text
    • http://iuts.space/2761939402409all.pdfIn PDF document text
    • http://faketikus.22web.org/carry_on_jatta_movie_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378425/normal_600ef9d1d9075.pdfIn PDF document text
    • http://zolekumosex.iblogger.org/ph_acids_and_bases_worksheet_answers.pdfIn PDF document text
    • http://becloud.website/persyaratan_sim_c_20190x39m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gimezevu.epizy.com/vevedufusawotebanumebeb.pdfIn PDF document text
    • http://zopefunexot.epizy.com/75859392427.pdfIn PDF document text
    • http://jabukejezari.epizy.com/pamesawaxegutiwugakazela.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_off0000c568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC568 5124 bytes
SHA-256: 9be4b4df97f996d2344be04490f239b88b47ed6d97e8846ada7ac6d8661437ab
font_01_sfnt_off0000d6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EB 16936 bytes
SHA-256: 6c2ded0bb09e9e4d6685a2b394deec57b771f6026e08a80b4564f29d14e7eeb7

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