Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c4d45c9742762a7…

MALICIOUS

PDF

81.3 KB Created: 2021-03-13 22:27:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b934e7b28a9d91e685cc3d3b60a03679 SHA-1: ccf40c05c6ab5cb9432f608a6965b1da80405787 SHA-256: 5c4d45c9742762a77298df37085352e5634e5ccaecf1e2caf977f23d64d9037a
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 0.9996

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://pelibifir.ru/strik?utm_term=how+to+make+your+crush+fall+in+love+with+you+wikihow PDF link annotation
    • http://55571.ru/mujhse_dosti_karoge_full_movie_streamingxwemv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366964/normal_5fdf9a778a01b.pdfIn PDF document text
    • http://carinsusa.info/make_avr_programming1zko5.pdfIn PDF document text
    • https://cdn.sqhk.co/vugujebeku/diajihd/bad_2_bad_extinction_cheat_apk.pdfIn PDF document text
    • http://damvglaz0.xyz/how_often_do_you_feed_dermestid_beetlesjbsue.pdfIn PDF document text
    • http://meetdouche.xyz/waravanepesedinutizezemk58eu.pdfIn PDF document text
    • http://lianhua.life/how_to_determine_my_ip_address_windows_7dnmui.pdfIn PDF document text
    • http://topmassage.net/balsamiq_mockup_32_bitrs4ef.pdfIn PDF document text
    • http://ital-girl.space/82042021744ajjst.pdfIn PDF document text
    • http://blubadgehelp.net/975957077390oxpl.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/jBGjcjb/classic_soft_rock_music_radio.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/LeREhbq/space_coast_launch_schedule_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/ggjcEhe/xenoblade_2_nia_figure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489404/normal_603fe71b6962e.pdfIn PDF document text
    • http://chestlune.online/42433477988c9iyo.pdfIn PDF document text
    • http://reweder.site/doulci_bypass_serverp3a2i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386084/normal_5fe5a9acaf96e.pdfIn PDF document text
    • http://myirn.icu/70607346416qzomr.pdfIn PDF document text
    • https://cdn.sqhk.co/lokabawopup/TbkLmgg/52291727654.pdfIn PDF document text
    • https://cdn.sqhk.co/vuranataxu/cmie8xX/micro_machines_v3_download_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_602cb7ce43994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428341/normal_60162965bb8b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 5

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_off0000feb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB9 5400 bytes
SHA-256: b38664bf198c0e713ebd30eff44947765928621568cb827f898f88a73e85bbb9
font_01_sfnt_off00011107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11107 11876 bytes
SHA-256: 37cc2e7572339c1caa0ed7c8cc7f75df1d0f86b97928bdc9d10d4b30922b6b67

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