Malicious PDF — malware analysis report

Static analysis result for SHA-256 347b954d3fef301d…

MALICIOUS

PDF

77.8 KB Created: 2021-04-07 07:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3bb3ac9b4fa671bb63feb46a276d2a4c SHA-1: 256fafcb20d9127aa0320c4a599535d1ef4228f0 SHA-256: 347b954d3fef301dd3983dfda977220c2ed543977240605302ac4bf29badb66d
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic firings, particularly PDF_SEO_DISPOSABLE_LINK_FARM and PDF_URI, reveal that the document contains numerous embedded links pointing to external domains, suggesting a phishing or malware distribution campaign. The presence of these links and the overall structure strongly indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=robert+kiyosaki+children PDF link annotation
    • https://cdn.sqhk.co/pifizumux/kP7i2ge/88043148688.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/salary_of_medical_officer_3.pdfIn PDF document text
    • http://casbah2point0.com/55902114343aaa38.pdfIn PDF document text
    • https://cdn.sqhk.co/kowalaxu/hmghOgj/bhojpuri_song_bhakti_mp4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443803/normal_5fff4ebaeb30c.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/aLTifhj/fantasy_football_name_generator_seahawks.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/ic5eo7l/ludilenipajotikokiseb.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/i6iconG/nunikawuwulatirepu.pdfIn PDF document text
    • http://espacecmb.xyz/64507455440w4r2u.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/glUjhjg/mortal_kombat_11_rambo_dlc.pdfIn PDF document text
    • http://instapriz365.online/how_to_fix_e2_error_on_trane_thermostatqk2kf.pdfIn PDF document text
    • http://kelimap.mywebcommunity.org/allyn_and_bacon_guide_to_writing_8th_edition_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380540/normal_6022e25c5bf67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416305/normal_604174ff61203.pdfIn PDF document text
    • https://cdn.sqhk.co/takabalal/rjfgfXg/akbar_birbal_ki_kahani_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xusopusavo/1oKhjmQ/biwobojepanedata.pdfIn PDF document text
    • http://pmaider.com/motu_ultralite_mk3_firewire_manual04mwx.pdfIn PDF document text
    • http://kernig.pro/10419774119qxqbo.pdfIn PDF document text
    • http://kivabixedopat.22web.org/ceftriaxone_iv_administration.pdfIn PDF document text
    • https://cdn.sqhk.co/lixozimiz/icjec4f/werezegaxusu.pdfIn PDF document text
    • https://cdn.sqhk.co/videbamez/hehajdN/furegafewakivozas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fexinitakemalu.epizy.com/how_to_layout_electrical_plan.pdfIn PDF document text
    • http://kesakopibovadob.rf.gd/10280095742.pdfIn PDF document text
    • http://tuzagexesowojoj.epizy.com/cartel_cubano.pdfIn PDF document text
    • http://ribizotujigotok.rf.gd/maulana_abul_kalam_azad_image.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_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 5340 bytes
SHA-256: cbfb2a5885d1f7871603de397a817a8b05923185f7869b4513065cca81005773
font_01_sfnt_off00010414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 11096 bytes
SHA-256: edcaec4d69c4caffe0fc525d647af47a94323501f7d28ecf4f97e66b71b52d4c

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