Malicious PDF — malware analysis report

Static analysis result for SHA-256 b336b219f704ad31…

MALICIOUS

PDF

76.6 KB Created: 2021-03-24 12:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7b07920ec022bf399228f91a8bf52816 SHA-1: d92e8800cc44294a14768f0b87fdff849755c172 SHA-256: b336b219f704ad31ed41584ef5502f83ae28145e1c4aa227dda7f87cdd244cc1
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 0.9998

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://midufefew.ru/wix?keyword=ap+us+history+princeton+review+pdf PDF link annotation
    • http://cmb-societe.com/77909577290ufmpr.pdfIn PDF document text
    • http://apkweb.net/buddy_murphy_theme_song4tyzf.pdfIn PDF document text
    • http://trysol.xyz/467045484150bsmm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366949/normal_5ff432c4a8710.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426967/normal_5ff486d98e050.pdfIn PDF document text
    • http://smartradiobf.ru/mukojovejilejotudeffcakb.pdfIn PDF document text
    • http://vanlit.ru/traditional_and_modern_teaching_methodsb5lgs.pdfIn PDF document text
    • http://magic-world.site/nattamai_movie_songs_isaiminikfk84.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/uidjfhc/fatal_raid_mod_apk_happymod.pdfIn PDF document text
    • https://cdn.sqhk.co/togodawexu/e7jdjd7/mekurepomaruzakiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447265/normal_604d08e9d7195.pdfIn PDF document text
    • http://smartcreditus.info/377720381641cs9u.pdfIn PDF document text
    • https://zunitaxipef.weebly.com/uploads/1/3/1/3/131398356/josubozatafefitorex.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/2877100.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc6e00f-d1cd-4c44-bcb5-3857e8de6e8f/dawofawogovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb7742d-34ba-43f1-ba23-cc03c8cbd302/jaybird_x3_running_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfab81b3-3be2-44e4-8aa2-7753113af85b/susabame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63492de0-5ee1-4d11-ada1-ed510b4f7365/comptia_a_complete_study_guide_exams_220-901_and_220-902.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_off0000ee2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2E 5244 bytes
SHA-256: 2f03c0272c26547580341d885c23b09b0da90327f31b7731d7a309eff3dc8ab1
font_01_sfnt_off00010026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10026 10996 bytes
SHA-256: b4731a7a925d4f972a19d72ed4f925249650acc97ddcef2d5384bf7b56512be6

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