Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d7a7fb5f1f8ed7…

MALICIOUS

PDF

69.4 KB Created: 2021-05-16 17:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 174b1000fdbe4e7ec65e984dd255ee3c SHA-1: 1ea1d4693b52eeb52ff3d90c875f06ba6a3e7ebe SHA-256: a7d7a7fb5f1f8ed7d8b1c5e3e6b363233fa51348e193ed672092b3ed8bec49d9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is a link farm and is flagged by ML classifiers and ClamAV as malicious. It directs users to a URL that appears to be a phishing or malicious site, disguised with search terms. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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://seumenha.ru/strik?utm_term=briggs+and+stratton+vanguard+13+hp+parts PDF link annotation
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn.sqhk.co/mojazejo/hbjhtct/eve_online_faction_warfare_missions_guide.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/zibuwedapowubuw.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/dicKjda/ice_cream_freezer_amazon.pdfIn PDF document text
    • http://fishland.store/lopazugec8ut8.pdfIn PDF document text
    • https://cdn.sqhk.co/karelevo/JjiBeTf/guzemilesumog.pdfIn PDF document text
    • http://strahuemsya.info/plataforma_academusoft_utogdvw.pdfIn PDF document text
    • http://nanolenka.xyz/gemilenopamiralalawusc1wl9.pdfIn PDF document text
    • https://cdn.sqhk.co/gevopobi/gjghrHc/tank._io_play_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gotimovogeminir.myartsonline.com/bestiario_pathfinder_espaol_descargar.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_07aaf49858b54935b08595e541bd6789.pdf?index=trueIn PDF document text
    • http://zoxedoronavo.epizy.com/how_do_i_reset_my_swann_dvr_to_factory_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4976675f-6628-48d9-9fc2-fd3bfe431fe9/xevisujatemijuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd3c62dc-3cc1-4dc2-867f-aaaf5991fa75/lexus_rx_350_price_in_nigeria_2012.pdfIn PDF document text
    • http://lurarapekakaka.atwebpages.com/boost_c_application_development_cookbook_second_edition.pdfIn PDF document text
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_b9a5edbf6eb847ffa5fbd663afa7809a.pdf?index=trueIn PDF document text
    • http://vukenorap.epizy.com/descargar_banorte_movil_apk_4._4.pdfIn PDF document text
    • https://e20cc215-f83b-4681-96af-be46f83cbbf7.filesusr.com/ugd/99b222_89b692ed02784b398e9984d3107634b5.pdf?index=trueIn PDF document text
    • http://toguzojokes.epizy.com/15129327680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b037c9ff-5759-440c-9765-b05ae660eaf9/24710734484.pdfIn PDF document text
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_78cda8fee2b74d94bea7e88f9532b88c.pdf?index=trueIn PDF document text
    • http://mawekipabotore.epizy.com/kafor.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_off0000cd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7E 5516 bytes
SHA-256: 12a5de93cfd4d615828c8950e5f9bb9fd333c640c16ea25c9920814d4cc12b91
font_01_sfnt_off0000e044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE044 11300 bytes
SHA-256: 8ae8676b305f01d068553910b584662ab2d9ce884381b65ce65a9946c3a5f73a

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