Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6aaa35d539b561…

MALICIOUS

PDF

95.8 KB Created: 2021-04-19 19:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b4aec9dd1d5f55999617704a52008389 SHA-1: 1ff3fcc41d751c29c75a23aef400f560a3072caa SHA-256: 0d6aaa35d539b56163e7dbb2ab5c5233506ec691b22ba034c2dbec66c0729b6a
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to SAT exam results, directing users to external URLs. These URLs are likely part of a phishing or malware distribution scheme, aiming to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=what+to+do+after+giving+sat+exam PDF link annotation
    • http://fringigejy.site/885337579536mwvv.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/hfk9Mhc/machine_builder_jobs.pdfIn PDF document text
    • http://naturebiolog.space/perfume_the_story_of_a_murderer_full_hd_movie_free_downloadiptxo.pdfIn PDF document text
    • http://kemikavar.mypressonline.com/aditya_birla_mutual_fund_application_form.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/dnVggVy/ates_ve_su_4_indir_ve_oyna.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/7ja8thj/zulosapafozuze.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/bissell_proheat_2x_healthy_home_pet.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/hZPT3pP/tukelemogofivikikexajuxo.pdfIn PDF document text
    • http://help-copyrighteamservice.com/atmosphere_by_outburstnrg0w.pdfIn PDF document text
    • http://reduslimitaly-official.website/hotel_housekeeping_checklist_formatrgzbf.pdfIn PDF document text
    • https://cdn.sqhk.co/mewidexe/hi2rQid/cash_app_login_online_account.pdfIn PDF document text
    • http://xepewifub.mygamesonline.org/abc_writing_worksheets.pdfIn PDF document text
    • http://xirapanagix.getenjoyment.net/ceramic_materials_carter.pdfIn PDF document text
    • http://cosmicgig.com/tascam_dr-05_firmware_updatevjh9f.pdfIn PDF document text
    • http://whalesqpa.fun/rajebeped9efw2.pdfIn PDF document text
    • https://cdn.sqhk.co/voxobidivel/idGIuSm/49277640277.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/ihfgiji/xuwumu.pdfIn PDF document text
    • http://idealicaitalia-official.site/67030888595pcq8g.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/creative_writing_prompts_for_teens.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nudagimanefej.atwebpages.com/causes_of_lung_cancer.pdfIn PDF document text
    • http://pimimozoji.myartsonline.com/chase_sapphire_reserve_benefits_guide.pdfIn PDF document text
    • http://farudigenudoze.onlinewebshop.net/jimopabamutamitimi.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_off00013798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13798 5432 bytes
SHA-256: d47c22920515a9ac316025221d619508d5a112f7b05cb1c36a766b36c14dff2d
font_01_sfnt_off00014a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A01 11020 bytes
SHA-256: e79149a617caec05d78b5d988cef8646dba4b5e9513a9888ca616589378ca208

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