Malicious PDF — malware analysis report

Static analysis result for SHA-256 5905133fb36816be…

MALICIOUS

PDF

72.4 KB Created: 2021-02-19 07:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5fb4ea7ceb580a4726fef79df94980e8 SHA-1: 51c7cbfe0b483534617e4819d3992c5a55f21598 SHA-256: 5905133fb36816bef838d799770b9bb083602345212fd8d1b9efe1f7b82bd4d2
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 0.9997

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://jottigo.ru/strik?utm_term=did+dunkin+change+cup+sizes PDF link annotation
    • http://mijakaku.iblogger.org/degree_needed_for_computer_systems_administrator.pdfIn PDF document text
    • https://fafafupoxojamu.weebly.com/uploads/1/3/5/3/135350358/8674416.pdfIn PDF document text
    • http://kuvurewe.22web.org/lds_book_of_mormon_stories.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/suxiju_rarag_sijerekarabet_desurabeva.pdfIn PDF document text
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/julosizejedale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467593/normal_600b340b96118.pdfIn PDF document text
    • https://pekamadepo.weebly.com/uploads/1/3/4/3/134321673/4006419.pdfIn PDF document text
    • https://fotavimapuwe.weebly.com/uploads/1/3/2/8/132816041/lagoma.pdfIn PDF document text
    • https://loseseseveru.weebly.com/uploads/1/3/0/8/130813975/d7ded10cf9207.pdfIn PDF document text
    • https://duvugegigoga.weebly.com/uploads/1/3/1/4/131409055/vizabowupiburaf_kuxavimelixudi_tokaredo_filabujipuf.pdfIn PDF document text
    • https://pimakesoxokozo.weebly.com/uploads/1/3/4/0/134041299/9779317.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424010/normal_6002f81cdb95b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/brush_lettering_practice_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/athlean_x_proper_squat_form.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/abbyy_finereader_software_crack.pdfIn PDF document text
    • http://jitimixilu.epizy.com/watch_bollywood_movies_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/74918354930.pdfIn PDF document text
    • http://jenofabejuvokag.epizy.com/florida_explorations_in_core_math_answer_key.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_off0000df16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF16 5320 bytes
SHA-256: 3fc74d993d1e82333d3e2e1acf0b246a01b4b578009227b2df11cdd4dc8b10c3
font_01_sfnt_off0000f142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 10412 bytes
SHA-256: 5fae49e5db4f288aa06975eaa874c656d2efbd220e03913b3a63289e67a73edd

Open this report in the interactive analyzer, or submit your own file for analysis.