Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d957833e7399c1a…

MALICIOUS

PDF

81.9 KB Created: 2021-05-13 09:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e581c3b6bfa31cf9066b99020802b65f SHA-1: e135eb2cdfd8aa0cfb2a27c975baf46cf6f1fba3 SHA-256: 0d957833e7399c1a020525f35a345c49a2478b34eb6dfe94bdc48cf3cb37c62f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the final malicious destination through multiple redirects.

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://resalured.ru/strik?utm_term=individual+development+plan+powerpoint+template PDF link annotation
    • http://dithetsen.xyz/mercury_7.5_thunderbolt_weightukbvu.pdfIn PDF document text
    • https://palokeligiz.weebly.com/uploads/1/3/4/4/134496709/8142794.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/sony_ps-lx300usb_beltbc1yk.pdfIn PDF document text
    • https://koneligave.weebly.com/uploads/1/3/4/5/134581264/risap.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/themes_in_west_africa_s_history.pdfIn PDF document text
    • https://tuxemadoja.weebly.com/uploads/1/3/2/7/132712185/puzinojituno.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/the_inferno_2b6z4e.pdfIn PDF document text
    • http://spindlndou.space/pojivugxj5t8.pdfIn PDF document text
    • https://tobivuzulukimu.weebly.com/uploads/1/3/1/3/131384599/5876168.pdfIn PDF document text
    • http://callup.today/nelot99p3o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417318/normal_604639719e7ec.pdfIn PDF document text
    • http://idealslimitaly.site/wow_addon_decursive_guidea0iwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446647/normal_6045874792c75.pdfIn PDF document text
    • https://najonetawo.weebly.com/uploads/1/3/4/5/134522785/zowonitifigoteworo.pdfIn PDF document text
    • http://eroganoficial.site/didefkr9lu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453888/normal_60361144e3c96.pdfIn PDF document text
    • http://lbaranaydin.com/44036572969zi3k2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447669/normal_5ff4a9d872ca9.pdfIn PDF document text
    • http://kewatupu.scienceontheweb.net/fezofus.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/gomaxod/mirixafipajiroxukevum.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/93610403981.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_off00010171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10171 5016 bytes
SHA-256: 1fdd633dd84ed65fbb9ea599a6a6b211e39f77b9ac9dd84f087a7d6a16f32190
font_01_sfnt_off00011280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11280 11796 bytes
SHA-256: 786d6cba5224964316728945ae13d9aa4359d8995232e50d53bff5ba27c04073

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