Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e799c3f807248e6…

MALICIOUS

PDF

74.9 KB Created: 2021-04-07 08:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9c05d240bfd8316a2dd2aac196c485c7 SHA-1: 06d395e51e3fa2efd2bde33652376e8bc04f22b1 SHA-256: 4e799c3f807248e6923f8e8f6ffa1c7e33e1a5227d75170aff11382ab2e9e1b1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs suggests an attempt to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://gimoguvi.ru/award?keyword=scope+of+business+finance+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374685/normal_6059d51465e4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5fd63d7a7b24d.pdfIn PDF document text
    • http://barberking.best/rapid_spanning_tree_protocol_wikipedia66koz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417808/normal_5fc850c88d595.pdfIn PDF document text
    • https://cdn.sqhk.co/lezubenewago/yV5idGA/color_picker_html5_input.pdfIn PDF document text
    • http://dugarudewemudo.sportsontheweb.net/assessment_for_learning_b._ed_book.pdfIn PDF document text
    • https://cdn.sqhk.co/zodenizekija/jbhhtgc/business_management_jobs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_601f0ca743885.pdfIn PDF document text
    • http://appless.space/nepozatitjqhal.pdfIn PDF document text
    • http://jixaravaxagisuf.22web.org/foxarazojobomegozipuw.pdfIn PDF document text
    • http://copyright-services-us.com/6902296360yk2r2.pdfIn PDF document text
    • http://vipadminler.org/accuair_e-level_management_systemexmab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501361/normal_5ff0f7c698d5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5fe3c01bcf063.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/pI0pwjb/wuxilulaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375515/normal_5ffe5a5bd5003.pdfIn PDF document text
    • http://vuxilenusip.mypressonline.com/3273872382.pdfIn PDF document text
    • http://xepewifub.mygamesonline.org/bexadetigadowosofisoxakob.pdfIn PDF document text
    • http://nositadox.mypressonline.com/biology_book_free_download_for_neet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460070/normal_5fcef7cd1e047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416810/normal_5fe76a1d65dc1.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/hiHhdji/best_video_maker_app_for_android_free.pdfIn PDF document text
    • http://easy-money-cash.space/wadebotakitiviwiwtnkr0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384035/normal_600492a57d8af.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/D8ifij3/27208998277.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zawovasozanadi.epizy.com/padixuxapokilitapoxuvali.pdfIn PDF document text
    • http://voperafabekom.epizy.com/gajuvivigadofez.pdfIn PDF document text
    • http://labotiz.rf.gd/case_files_internal_medicine_fifth_edition.pdfIn PDF document text
    • http://vapugoluz.rf.gd/ihya_imam_ghazali.pdfIn PDF document text
    • http://laxolagodofomug.onlinewebshop.net/49274434369.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_off0000e904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE904 5264 bytes
SHA-256: b272fea8c1fde624bd7d2616687f8663db4aad057ddd2c6e3676cc7bb1b0b0f5
font_01_sfnt_off0000fafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFD 10224 bytes
SHA-256: 38a0e989305358bb43a23f7e0e7b8864c11802e2d429452b277fb78e4feae245