Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3c1244efd8f42a…

MALICIOUS

PDF

69.6 KB Created: 2021-03-14 17:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cbdfa4021bce52b699806175633820ce SHA-1: d802cf3c93cd44ab136d9dbfc9c88636cebe4848 SHA-256: 0f3c1244efd8f42a163d0f05781049bffdd355187a65645d6340e0b6f0d6d1f7
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many pointing to disposable domains, and uses 'utm_term' parameters suggesting a phishing or spam campaign. The document body, though heavily obfuscated, contains text related to search queries, indicating a lure to external 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://mezovuduw.ru/123?utm_term=examining+whole+number+digit+place+values+answers PDF link annotation
    • http://linavaluviriv.getenjoyment.net/how_to_calculate_concrete_material_as_per_mix_design.pdfIn PDF document text
    • https://cdn.sqhk.co/jaselavujuwi/GUrb2hb/83899906210.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/xelorijajutefemijavupix.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/x9xUia9/the_best_disco_songs_80_s.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/kuwidalojifonazomerede.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/teorema_binomial_newton.pdfIn PDF document text
    • https://cdn.sqhk.co/jujuziwe/fyxgcif/shudder_tv_show_sundance.pdfIn PDF document text
    • http://xizugef.medianewsonline.com/76558690219.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_a1d47208dd304227b738c9579b4acf0d.pdf?index=trueIn PDF document text
    • http://girofili.myartsonline.com/the_way_we_live_now_susan_sontag.pdfIn PDF document text
    • http://jitabemap.rf.gd/acer_iconia_a210_stock_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/53545854168.pdfIn PDF document text
    • https://5e1449e8-5ae4-4a15-bc7a-ee23795bc964.filesusr.com/ugd/3a34a5_6a949e142d62459dae00a70c1f047674.pdf?index=trueIn PDF document text
    • http://jokoligu.rf.gd/nilevuguxikexiloweda.pdfIn PDF document text
    • http://gevewodex.epizy.com/zozusezivit.pdfIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_666d3039345a464688f9c39cc7ac2df6.pdf?index=trueIn PDF document text
    • http://vigexosav.myartsonline.com/schneider_ats01n222qn.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/lasemivitonibafaderiwafad.pdfIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_f6ec9c84eccb4b48a82d104c37d93f0b.pdf?index=trueIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/what_is_the_setting_of_me_before_you.pdfIn PDF document text
    • http://ligexaxo.epizy.com/adobe_premiere_pro_cc_2017_basic_tutorial.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_off0000d275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD275 5804 bytes
SHA-256: eee4b2edfb1034a551cdc1c9a4ee148acda01f9a9d7abe142dc1aecf0ab3036b
font_01_sfnt_off0000e621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE621 10116 bytes
SHA-256: a3f8cc9ed694aea641edafec95eca122dfad019a88bd81b7c9d8fa3ded051569

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