Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9d7b44eb22714b…

MALICIOUS

PDF

79.8 KB Created: 2021-03-15 21:31:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fe01a34f46a71cfe387cce7eca91ebf0 SHA-1: 7c69841cae0eae0306595f9acbca78be0294cd6f SHA-256: 0b9d7b44eb22714b9373df3dac0afb24d9030a9a52cdeb3188c0945932f5b298
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized redirectors, suggesting a phishing or content-luring scheme. The primary lure appears to be 'images of gilmore hatch gamefowl', directing users to a suspicious domain. The presence of PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK heuristics, along with a high ML score and ClamAV detection, strongly indicates malicious intent, likely for phishing or malware distribution.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wix?keyword=images+of+gilmore+hatch+gamefowl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444102/normal_5fd635dbb2a6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473053/normal_5ffb44d77068e.pdfIn PDF document text
    • http://winoorama.fun/799038176724lkx5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454682/normal_6007b4160a2bf.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/30501136098xvaef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_60110d4350048.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388067/normal_5ff9e413728b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454807/normal_5fe23639221d7.pdfIn PDF document text
    • http://lijamerogavex.iblogger.org/accedere_mail_icloud_da_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_60384febf2f4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369343/normal_5fcd19f6a335d.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/tojazudibumogab/apache_openoffice_4._1_5.pdfIn PDF document text
    • http://losebur.epizy.com/drug_information_handbook_for_dentistry_25th.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/13373558452.pdfIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_93e8b06ec5014050829dd484511494a5.pdf?index=trueIn PDF document text
    • http://muravurut.epizy.com/lututimidusotemakikano.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/51506922077.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/editable_weekly_cleaning_schedule_template.pdfIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_fa66b82f67bc40f7bc86bc6189f48843.pdf?index=trueIn PDF document text
    • http://sunuwib.epizy.com/bojokejinazofilakegosi.pdfIn PDF document text
    • https://df9f6e4b-8d15-4ffc-a22d-a689b54aa2df.filesusr.com/ugd/205ae4_46294fba6a1348d2a86d6dc8685d3443.pdf?index=trueIn 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_off0000f2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F4 5324 bytes
SHA-256: 58fc9d85f0549b56d4ea3c6fda315d167ede682b3db9a5d09ef59bd0493b4ede
font_01_sfnt_off000104f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F5 13892 bytes
SHA-256: 3658923b93642a3316b16fcbfc82de34fb2b6f25c44c316497b97d45139c212f