Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2c1133aa9c6d04…

MALICIOUS

PDF

83.2 KB Created: 2021-04-20 18:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 24822f0f80a3491ad3792103c1f6c020 SHA-1: a95e1860bd7d71cf6cb740c359b3c349fa6845bf SHA-256: fb2c1133aa9c6d043ea932d33830af4c8ddc653458e1298dc3e353c9662af560
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=the+little+book+of+common+sense+investing+italiano+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495241/normal_601ac2c82af7c.pdfIn PDF document text
    • https://cdn.sqhk.co/konajera/f1EUwOf/centr_app_chris_hemsworth_price.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/89226640948.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415929/normal_6005b48acbe40.pdfIn PDF document text
    • https://lixazasowab.weebly.com/uploads/1/3/4/5/134588429/gofikujepo.pdfIn PDF document text
    • http://garant-ritual.online/pewdiepie_legend_of_the_brofist_android_apkrj3s0.pdfIn PDF document text
    • https://jatekokem.weebly.com/uploads/1/3/2/8/132814322/948645.pdfIn PDF document text
    • https://cdn.sqhk.co/kalusoxat/jcHgdMz/legend_defence_academy_lucknow.pdfIn PDF document text
    • http://usechambre.xyz/manual_usuario_audi_a6_2017599fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379626/normal_5ff759dbc8c99.pdfIn PDF document text
    • http://urologo.store/bewadazufegivaliwixememeswrh3s.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/motagutazojusivexamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418381/normal_602cb2b4d6eae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_60171db40b3aa.pdfIn PDF document text
    • http://com-servers.online/download_head_football_la_liga_2020_mod_apko9470.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/pipaneku/datasheet_transistor_bc547.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/adobe_flash_player_3d_games_free.pdfIn PDF document text
    • http://lopafulobitap.atwebpages.com/exercises_although_though_despite_in_spite_of.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/annual_report_of_reliance_foundation.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/85155855966.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_off00010410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10410 5684 bytes
SHA-256: 02c0418eb20e0423d0a89a46c38594cfdbde929fbc8a21477e0aa6afb7abccd4
font_01_sfnt_off0001174b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174B 11984 bytes
SHA-256: 350075bbe0295c2554490facf99e89cccfad76517bdc599f2e6bacee47fdef04

Open this report in the interactive analyzer, or submit your own file for analysis.