Malicious PDF — malware analysis report

Static analysis result for SHA-256 597a512833a199d0…

MALICIOUS

PDF

82.1 KB Created: 2021-03-24 09:15:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 46adbe5fdab8b2efe8dd24ec57e9d54f SHA-1: 50643644cd339d0c54d5b34d8052e1b2eed6a29e SHA-256: 597a512833a199d0cb801f00b4370d4f6c88893a89096b1caf5b50e9f89af1df
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/strik?utm_term=stock+exchange+closed+today PDF link annotation
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/7210222.pdfIn PDF document text
    • https://ruwufinojib.weebly.com/uploads/1/3/4/6/134643146/nexikinavoxixejalodu.pdfIn PDF document text
    • http://girlsbeach.space/best_jump_scares_on_youtubewwqal.pdfIn PDF document text
    • http://infonewsuk.site/lutron_caseta_wiring_guideyfid6.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/7SjchiZ/81625270438.pdfIn PDF document text
    • http://toppiksnack.xyz/ruzofaturov02a4b.pdfIn PDF document text
    • https://zegesunipatobas.weebly.com/uploads/1/3/1/3/131379774/2131740.pdfIn PDF document text
    • http://jakartapro.xyz/33354842874cqtck.pdfIn PDF document text
    • https://cdn.sqhk.co/muvetowiripa/VgeHcij/retroviruses_are_characterized_by.pdfIn PDF document text
    • http://item-get.top/tuziwuzipekarozebpyu5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d4462a4-4c4c-473c-ac76-059ef5607efb/hp_envy_4500_price_in_india.pdfIn PDF document text
    • http://wegolas.epizy.com/boxuzisobepe.pdfIn PDF document text
    • http://zinizebaki.epizy.com/misogomiviruwexazaxofofi.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/nvidia_audio_drivers_windows_10_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/muwidadadoxurijivus.pdfIn PDF document text
    • http://lerezivopo.rf.gd/berkeley_group_annual_report_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/rokubibexururikadanim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94657e8b-032c-4117-92cf-a721ec3e1e82/87354340921.pdfIn PDF document text
    • http://bepowawon.rf.gd/red_chili_background_vector_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb80dbfc-5848-460e-8871-48692648fa59/dictionary_english_to_hindi_download_for_pc_windows_8.pdfIn PDF document text
    • http://vosowetawevu.epizy.com/amulet_titan_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/dilojinabibom.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/zufubuwewirewamuxikiweman.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001021f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021F 5444 bytes
SHA-256: f8d99bb555ef49a388b81ec0912ae9ebbdd8bdd61a39b5b6e6fc0ed5635e08a0
font_01_sfnt_off000114b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B1 11280 bytes
SHA-256: 531702c2fb1eac9bfdaf29945e1b1bfa72613631f139c7f56743351b8f664f1c

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