Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf59da4ae71a3dc…

MALICIOUS

PDF

75.1 KB Created: 2021-06-07 13:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b4c1b573e37295c77679c283db03c983 SHA-1: 2662fdde4fca1117743679acbad3d76e28c429eb SHA-256: fcf59da4ae71a3dcdb41f24f256fb1c7bb85f4d1e5f7be78c7a69871ade4f064
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://archism.ru/pbw?utm_term=havij+apk+full+version PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388613/normal_5ffb45d36752e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469143/normal_601a4a14b5e6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_6062a2a86152d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455901/normal_5ff812403c1d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464070/normal_60642fbf75533.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jolunatimavu.pbworks.com/w/file/fetch/144503784/madeas_big_happy_family_play_free_online_to_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30059013-7a44-4471-af47-ae3820abb2a0/mivabuvuj.pdfIn PDF document text
    • http://watusuxipidu.pbworks.com/f/22067944835.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/w/file/fetch/144465321/72501106021.pdfIn PDF document text
    • http://barumena.pbworks.com/f/gun_mayhem_2_unblocked_games_hacked.pdfIn PDF document text
    • http://pikalunik.pbworks.com/w/file/fetch/144692403/matematica_de_tercer_grado_actividades.pdfIn PDF document text
    • http://xosezoranad.pbworks.com/w/file/fetch/144754968/cant_connect_to_wifi_repeater.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/salary_after_11th_bipartite_settlement_quora.pdfIn PDF document text
    • http://jizakatum.pbworks.com/w/file/fetch/144490272/12235214711.pdfIn PDF document text
    • http://wenitat.pbworks.com/w/file/fetch/144774087/cuando_se_utiliza_el_presente_perfecto_continuo.pdfIn PDF document text
    • http://kemuxin.pbworks.com/w/file/fetch/144553479/padman_movie_download_in_tamil_dubbed.pdfIn PDF document text
    • http://zobafolu.pbworks.com/w/file/fetch/144777789/easy_everyday_mediterranean_diet_cookbook.pdfIn PDF document text
    • http://jijagenaneke.pbworks.com/w/file/fetch/144477402/xipuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a38c93-189c-485b-b859-d56bc5aeceb1/wufakikemobituxi.pdfIn PDF document text
    • http://bavudexote.pbworks.com/f/frases_para_dinmica_el_telfono_descompuesto.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/f/candlestick_chart_pattern_analysis.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_off0000e8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8ED 5056 bytes
SHA-256: 8f4fb17747ab049ae0b29d516cccce989e2b1fb44b14fe4a56e948f316c365f6
font_01_sfnt_off0000fa3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3A 10876 bytes
SHA-256: 5fe45acb74bd3a92494f679da2e27f9e5c4b88abf9d967c279f65e700fcc5b5b

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