Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3db32197bbac2eb…

MALICIOUS

PDF

67.1 KB Created: 2021-03-18 16:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5f1aa23559372e9a4ff9698398a2fd80 SHA-1: b1cdf11e1d52fce2fd3c48d1b947112a2b77ceb5 SHA-256: a3db32197bbac2eb8c03cc7ee313f1cbc08dac2a19ae179fdca963ef9cb8399d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/award?keyword=cecelib+possessive+series+1+pdf PDF link annotation
    • http://fodelogutejamit.getenjoyment.net/22904189423.pdfIn PDF document text
    • http://degimogug.mypressonline.com/landscape_photography_magazine_download.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/jagewitipagu.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/janifopenogebume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_604a3c5015238.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/rusututivuguze.pdfIn PDF document text
    • https://rajikaluniker.weebly.com/uploads/1/3/1/3/131383998/8793772.pdfIn PDF document text
    • http://ziposodepow.mywebcommunity.org/3192039682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481058/normal_6033667168875.pdfIn PDF document text
    • https://pimefukidipobe.weebly.com/uploads/1/3/4/0/134096137/6b743.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/fabubefuvalelupenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_603b1a3521661.pdfIn PDF document text
    • http://dalifajebuxog.scienceontheweb.net/79320792397.pdfIn PDF document text
    • https://kuzirorox.weebly.com/uploads/1/3/0/7/130775715/603397.pdfIn PDF document text
    • http://pokinusuvato.getenjoyment.net/alimentacion_para_diabeticos_e_hipertensos.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/xilasisefi/40689058674.pdfIn PDF document text
    • http://romofimor.onlinewebshop.net/what_is_the_story_lather_and_nothing_else_about.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/71235173802.pdfIn PDF document text
    • http://kemesid.onlinewebshop.net/nerilad.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/povukadaxalakinelewut.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/give_information_about_cricket_in_marathi.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_off0000caeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEB 5096 bytes
SHA-256: cc267d700e864668fbc687fe71f6988da5fd5a53e89fb74b29a684e9a546d600
font_01_sfnt_off0000dc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC55 10032 bytes
SHA-256: 025be2db09bb93f37cd4626f877d5c2de36578fae2c1857acea1f64910e4d3ae

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