Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d449f44b896e3ce…

MALICIOUS

PDF

96.6 KB Created: 2021-03-19 20:25:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c14df563df99752fb3f8f9fba96b419b SHA-1: b774dec5e31f9aaec74b821c37a5387abc9baf18 SHA-256: 3d449f44b896e3ce34b6ee693e126bb9705da7e26969193b3943dd381bf7d959
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 embedded URLs, with a significant number pointing to disposable domains and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

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://nipisod.ru/strik?utm_term=are+ashab+e+kahf+alive PDF link annotation
    • http://the-english-temple.com/45059514940duq9e.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/para_que_sirve_el_jengibre_y_te_verdeiz6vj.pdfIn PDF document text
    • http://getsol.xyz/how_to_clean_bissell_proheat_carpet_cleaner_after_usercy4g.pdfIn PDF document text
    • http://imm-shoes2.club/airbrush_pro_free4do2w.pdfIn PDF document text
    • http://yandex-dostav.ru/fleetwood_southwind_owners_manualbyckp.pdfIn PDF document text
    • http://usesucre.pro/fepejiwefamofifovikikumff9jv.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/manual_de_instalacion_sistema_ansul_r_1026ino4.pdfIn PDF document text
    • http://veronaital.space/52400121178yn1u6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/1440595650.pdfIn PDF document text
    • http://nabapuxamiluj.epizy.com/political_patronage_in_the_philippines.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/pofozotelovipez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae738ce3-ebdb-422d-a724-b614fd411f99/el_conocimiento_silencioso_epub.pdfIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/nitabiwutevukeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b74f960b-ffcf-4b94-9d21-80d56132541e/837542108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1af678e-ce8a-4815-be59-a576c45ecc3b/69488548504.pdfIn PDF document text
    • http://sadigibesalij.epizy.com/givavatikupotaxewora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13aab72-064c-4f4d-b8d8-955fa9fc221b/enron_scandal_ethics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba5156cf-35ad-48e6-8ee0-31ed4be13256/gojukun.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001167d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167D 5108 bytes
SHA-256: a6d4b5134c7049e61b38b67052d5df83350f4ec9562f0f7065bc4c1a3da84194
font_01_sfnt_off000127d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D5 2252 bytes
SHA-256: ee967336568f77ff61a5ae04097864f25fb24cf77b94457ab20e22408cc95c1c
font_02_sfnt_off0001313d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313D 14324 bytes
SHA-256: 8eb98cf60b6f465743c324198d34c2112327b38224cc0657dc7139ba26cc127c
font_03_sfnt_off00015bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BB0 17100 bytes
SHA-256: c20de9be89488844746818736ff9883aa119478f47f13d253ccd80693b7942d0

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