Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed010d1e07ecf9ae…

MALICIOUS

PDF

76.7 KB Created: 2021-05-12 08:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 06007e16f0dd69740d0f3070aa85f987 SHA-1: bc5b9caa988b3b7c051fe485c9d28c83f2b08b52 SHA-256: ed010d1e07ecf9ae7893a493cf296b2a847aadb2fc6670afd92dc0a3ec3a837e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The primary malicious URL identified is https://botokaw.ru/strik, which is likely used to redirect the user to a phishing or malware-hosting site.

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://botokaw.ru/strik?utm_term=scag+wildcat+mower+prices PDF link annotation
    • http://ketrovk.xyz/burger_shoppe_kingston_ok_hourssv3fi.pdfIn PDF document text
    • http://fastcreditcheck.info/53267093529v6w7v.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/jcOthSS/mindshift_gear_backlight_18l.pdfIn PDF document text
    • http://ver-alex.website/habitat_acropora_formosa6t7q6.pdfIn PDF document text
    • https://cdn.sqhk.co/guwezasov/dDhbgcv/slot_games_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/pisomuma/cjfhda0/capybara_minitest_cheat_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388818/normal_6042ec1febe04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475586/normal_5fcc3091ebecf.pdfIn PDF document text
    • http://milanomodaitaly.site/jubixasoda1oklz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450046/normal_601283f492c62.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvidomanale/dPhibwq/wojekem.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/aefb31cf-b5fb-4668-b0db-88158a504f39/lewedujiwixaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbfd8e1-9232-4c20-b174-5927b2e803ff/94604985984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f08b16-c0f4-4055-aeb5-6df6128a4f5c/fesor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99380d40-900f-40a0-a8ec-ed47b7944558/78064898587.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/bwin_app_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b53fe3c-6d50-4e63-9797-518a3bc95ab2/84988577569.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/asvab_for_dummies_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/174616536.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/kazuduvatoluno.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_off0000ebf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF3 5588 bytes
SHA-256: 4b83806e89d3f1bba6f17fecaeaf9e7d1d08b2559d6fbc1a65fb0f7644ff8ca0
font_01_sfnt_off0000fef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF2 11420 bytes
SHA-256: 5902e2abafaef98738db7720665ae5b8f4b2e5db8f571ba897050b2aa132c18e

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