Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b4bb47ce238118…

MALICIOUS

PDF

87.8 KB Created: 2021-02-17 00:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 208163911b9598d39d395075634dc85f SHA-1: 8c94aa8183fa4e014b1c9346d45c40af9d69e375 SHA-256: e9b4bb47ce2381189bcfbf239232f5eeed533609f2839256d96afe32b14f2cca
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/wix?keyword=g+switch+unblocked+games PDF link annotation
    • http://wupupetobuzune.22web.org/kupugobixuwatadazokejunax.pdfIn PDF document text
    • https://cdn.sqhk.co/pajelidul/1ctEIhg/retufezutapiribawikibutik.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/jhj3jgv/ritewefuxofagosanadir.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/DQohihc/espn_nfl_power_rankings.pdfIn PDF document text
    • https://cdn.sqhk.co/gobenebovi/e3BXYwg/copper_prices_around_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480145/normal_600a11e201fb3.pdfIn PDF document text
    • https://vuginavoji.weebly.com/uploads/1/3/0/7/130775358/dasijapasi_niwozuvutager_kezebomimoxu_wolagamaguwavem.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/gepinepez_josuniragon_domataxidu_sulegefimubedo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_600b388f8a135.pdfIn PDF document text
    • http://natalifu.22web.org/gigabyte_aorus_gaming_5_z370_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/voxoduvi/gjahaii/jump_over_meaning_in_punjabi.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/ieF7igT/nawosoze.pdfIn PDF document text
    • https://revininone.weebly.com/uploads/1/3/1/3/131380081/2316050.pdfIn PDF document text
    • http://zuwigef.22web.org/mapotuxemozo.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/kij2u3T/viwolosaxigimilifavoz.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/ZjeulBt/dual_monitor_wallpaper_3840x1080_autumn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buziluzune.epizy.com/balancing_redox_reactions_worksheet_4.pdfIn PDF document text
    • http://varewokumozikon.rf.gd/jinememogutananifada.pdfIn PDF document text
    • http://wukefomirufiza.rf.gd/18897434194.pdfIn PDF document text
    • http://tikavufuku.rf.gd/25770858787.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_off0001197f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197F 5584 bytes
SHA-256: 6ffc4aa374f9ee01ff951958e3e3238932b1ac9645b74e8a68fe17fae3435ded
font_01_sfnt_off00012c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6B 11032 bytes
SHA-256: ff1a3d0bc951bf862de2bec8b57d986d928d7049c59b9af04a9a6a22e721981b

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