Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99fedf1d6de2269…

MALICIOUS

PDF

146.3 KB Created: 2021-02-23 06:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 47053e63fcfb3c955197240a7f806d20 SHA-1: 8a2dcf97fd8521a876a1cad6057f1875ad626d19 SHA-256: c99fedf1d6de2269671fbfaf492b1144e3636d8ca165a794757be5394a6dbbe5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable domains and flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

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://leonvi.ru/wix?keyword=american+pie+nadia+character PDF link annotation
    • http://savadaqwe.space/nozowedowigilogapuzomeraf71gbj.pdfIn PDF document text
    • http://cryogen.me/braun_flavorselect_coffee_maker_manualy5wsl.pdfIn PDF document text
    • http://mx50off.pro/mudidonolisv1q7q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450506/normal_601a0d4b3819d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475866/normal_5fe3934d545e7.pdfIn PDF document text
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/5624c2717.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427799/normal_5ff232abe9bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481515/normal_60175da2725b1.pdfIn PDF document text
    • http://svarka-aurora.online/30814428784gkbbv.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/bufabigopero.pdfIn PDF document text
    • http://ca-manalapan.space/ride_lana_del_rey_mp3_songs_free_downloadxeeh2.pdfIn PDF document text
    • http://sale50.pro/vulidugidukofujejepirupvxncc.pdfIn PDF document text
    • http://runolive.com/anandam_songs_starmusiqlte3w.pdfIn PDF document text
    • http://ledimpress.biz/bodozi7r931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462727/normal_6015e39088232.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/jukoxisojow/magnetism_worksheet_for_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/67402994262.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_off00020323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20323 5092 bytes
SHA-256: 6382d7dc7457bd4cd8ebf6a4a3b98c6fac11e42dbdaea091b252659228632f60
font_01_sfnt_off00021444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21444 12008 bytes
SHA-256: ed5cb9d5f8814a8925aad8a095b2d852f12e937b1c2c3c8dec796589258dceca

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