Malicious PDF — malware analysis report

Static analysis result for SHA-256 45dc2c446ddb6636…

MALICIOUS

PDF

77.9 KB Created: 2021-03-02 08:21:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b3ca34cdea99770d290df13409cac860 SHA-1: 297df9f573a5daafcd14c3b79b9e345c47db0dd6 SHA-256: 45dc2c446ddb6636a3e9bdad7b600be4b9925673916cf58a98208b2f65ade532
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external URIs, with a primary one pointing to 'xezojetit.ru', likely serving as a lure for users searching for specific content. The PDF's structure and embedded links suggest it functions as a link farm, directing users to potentially harmful external resources.

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://xezojetit.ru/aws?utm_term=chandamama+kathalu+in+telugu+videos+free+download PDF link annotation
    • https://cdn.sqhk.co/boxoveru/ja1jjcx/kamefekofudapafoxu.pdfIn PDF document text
    • http://gebatuvarak.66ghz.com/tovevavovigosoviwulugo.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/ia4IIjb/4090736446.pdfIn PDF document text
    • https://cdn.sqhk.co/dufubimaru/dhhji0p/20245916014.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/9igKjia/36833982881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381289/normal_5fda07cf40eab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465387/normal_5ff0a0c324958.pdfIn PDF document text
    • https://cdn.sqhk.co/guposidum/eHhczwO/gomebufomoduwi.pdfIn PDF document text
    • https://cdn.sqhk.co/wafavalufa/hgFhfje/virgin_pulse_voucher_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mivuturirem.rf.gd/52406305690.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/workplace_spirituality_and_job_satisfaction.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/dugikiz.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/molazojizuvopezalivav.pdfIn PDF document text
    • http://legabaxep.rf.gd/rupafenegepel.pdfIn PDF document text
    • http://fejobizife.epizy.com/cheppave_chirugali_movie_audio_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/72297435386.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_off0000f484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF484 5440 bytes
SHA-256: 7ee1c2ab9ab0c83c4165e80d00e7396b2463de8d46dd5da8d777cd60673de73d
font_01_sfnt_off000106f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F1 10276 bytes
SHA-256: 0aa9f7e64f059697f05871850fc8062b25350606fc9e0ba682f07342c0748db8

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