Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3c44c2c2587c70…

MALICIOUS

PDF

65.6 KB Created: 2021-02-28 06:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 42082f902b43a4a87e43c1ddbe4a004c SHA-1: 8ee6c51b84e4fe5b0a06bccc425f21b7f80c7d9e SHA-256: db3c44c2c2587c7091656d8db498e397d4a3b07db37f789f10c1b6001ce41ad4
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, characteristic of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous URLs suggests the primary attack vector is directing users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8523

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 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
  • 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://lozipotod.ru/aws?utm_term=what+should+i+name+my+small+business PDF link annotation
    • https://cdn.sqhk.co/fazejitev/Mxggb77/overlord_mass_for_the_dead_tier_list_global.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/eAjeBqB/khloe_kardashian_age_16.pdfIn PDF document text
    • https://nunevebola.weebly.com/uploads/1/3/4/8/134846747/sabunawinasigozovu.pdfIn PDF document text
    • https://cdn.sqhk.co/forexajepusa/WGihGii/lemon_crinkle_cookies_allrecipes.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/aSYXxTu/73214842566.pdfIn PDF document text
    • https://cdn.sqhk.co/kelufuro/cLgghhc/national_geographic_telescope_aldi_review.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/52953095332.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvepiwedo/CyaiiM1/legend_of_ace_heroes_guide.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/9d808671ea4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379363/normal_5ff7ef6c34e47.pdfIn PDF document text
    • http://timinome.getenjoyment.net/puxifazadetelojavub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476275/normal_600b38958d982.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/yE51hgH/tawelujexu.pdfIn PDF document text
    • http://wexegezi.22web.org/75038973404.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/62830132361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_600a7b4d21bc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magomodatibotu.epizy.com/komunozabovade.pdfIn PDF document text
    • http://jegozejixal.epizy.com/haynes_carburetor_manual.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 5224 bytes
SHA-256: e248e08e249e9ad80c118aae2be5a5b61080a41d05b18ba7b31fa2a1f9dad7ec

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