Malicious PDF — malware analysis report

Static analysis result for SHA-256 df63487c78b99dc4…

MALICIOUS

PDF

78.5 KB Created: 2021-03-13 17:07:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e61b714760d153bcceac3004f473dba5 SHA-1: 082769f37b651d7a20dc500e0ebedd726d868a85 SHA-256: df63487c78b99dc460d476767b065101f273a83d7d145c1a94db64a4e749a5e9
126 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or link-farming campaign, as indicated by the high number of embedded external URIs pointing to various domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to potentially harmful content or malware downloads. While no scripts were explicitly extracted, the PDF structure and numerous URLs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://vilenefex.ru/strik?utm_term=what+is+the+best+channel+for+verizon+fios+router PDF link annotation
    • http://navalny.design/english_speaking_practice_501_most_common_questionsumyjc.pdfIn PDF document text
    • http://faceit.su/oracle_pl_sql_tutorial_with_examplesj965i.pdfIn PDF document text
    • http://ilkertr.shop/8931848897mfarq.pdfIn PDF document text
    • http://kimugifogetami.medianewsonline.com/is_cyberpunk_for_ps5.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/icqic2M/chicken_invaders_3_christmas_edition_download_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/LifheGS/63664894577.pdfIn PDF document text
    • http://bexixibeguben.sportsontheweb.net/budgeting_and_financial_planning.pdfIn PDF document text
    • http://timelessdecorum.com/does_osha_require_annual_trainingh36hi.pdfIn PDF document text
    • http://timurberg.ru/how_to_warlock_spell_slots_workjk40r.pdfIn PDF document text
    • http://specrazreshenie.com/life_of_galileo_summary1184x.pdfIn PDF document text
    • https://cdn.sqhk.co/lidesoxu/hhihAgj/mariage_d_amour_partitura_para_piano.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/61034508167wjhij.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/1jbqhhG/christian_worship_songs_playlist_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/soboxuxafiso/hihmhat/scary_teacher_3d_game_play_free_online.pdfIn PDF document text
    • http://ch-redirect.icu/7.62x54r_spam_can_markingsh6246.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/bissell_proheat_powerbrush_carpet_cleaner_manual.pdfIn PDF document text
    • http://50offit.pro/how_to_treat_a_cystic_pimple_overnightz2afp.pdfIn PDF document text
    • http://istlan.space/thrifty_white_pharmacy_locationsmrlik.pdfIn PDF document text
    • http://fastgetme.online/a_christmas_carol_fx_release_datewsizi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tudixuzaw.onlinewebshop.net/rhythmical_excitation_of_the_heart.pdfIn PDF document text
    • http://gezixus.myartsonline.com/ritofowexexozujibinixe.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/37271526607.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/75500721265.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_off0000f2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FC 5232 bytes
SHA-256: 92c310e0331336a662fcfe397cc3b69e7182edbcd0806140a6d36bf1fa660658
font_01_sfnt_off000104de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DE 11596 bytes
SHA-256: 4a8532dc6c899a26762a622cd5bbbd80dcaf13163b60956983f5905857b2ab9e

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