Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fa00ad29cf4419…

MALICIOUS

PDF

87.0 KB Created: 2021-02-17 04:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8ca8ce51091c01f6ec81e92888f0bb56 SHA-1: 8ae7e11dc675d34f33ab913679908678cd4e00e1 SHA-256: 00fa00ad29cf4419dcd1b653f2666f161eea2641ff6125ea773ab31fd82128d2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting it is part of a link farm designed to drive traffic to potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs suggest it exploits PDF vulnerabilities or uses embedded JavaScript to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://baarspo.ru/123?utm_term=how+to+trade+forex+like+a+hedge+fund PDF link annotation
    • http://cmb-eco.com/cautivante_libro_descargarhvnlh.pdfIn PDF document text
    • https://bebadivinokad.weebly.com/uploads/1/3/4/6/134604253/ruxex-mowegavagumi-fomuxu-tosobuvale.pdfIn PDF document text
    • https://xuxijirabof.weebly.com/uploads/1/3/1/4/131406659/2198361.pdfIn PDF document text
    • http://neuroncraft.online/yii2_gii_form_generatorkk7on.pdfIn PDF document text
    • https://kaxudafesin.weebly.com/uploads/1/3/4/3/134355678/bitezep.pdfIn PDF document text
    • https://gekibevuzoz.weebly.com/uploads/1/3/4/5/134503907/janigonuvuva.pdfIn PDF document text
    • https://jaxedafotonomut.weebly.com/uploads/1/3/4/8/134885779/novoxugugewi.pdfIn PDF document text
    • https://nakaporona.weebly.com/uploads/1/3/1/4/131438848/zizikodajew_zenivudum.pdfIn PDF document text
    • http://tolumibawaka.iblogger.org/house_of_rising_sun_chords.pdfIn PDF document text
    • http://help-nanny.site/why_are_pimps_so_meandnzwn.pdfIn PDF document text
    • https://kezikiwagoxarud.weebly.com/uploads/1/3/0/7/130739267/09167f3.pdfIn PDF document text
    • https://sewusadata.weebly.com/uploads/1/3/5/4/135401056/693195.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410703/normal_5ff8f9b68622f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://desavoz.epizy.com/command_and_conquer_generals_ultimate_collection.pdfIn PDF document text
    • http://kewugozosefo.epizy.com/partes_de_un_boletn_informativo_escolar.pdfIn PDF document text
    • http://pewazeje.rf.gd/the_future_of_life_rhetorical_analysis.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_off00011841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11841 5176 bytes
SHA-256: fe11ebef43df689b80de0b36bb1e531cb4254d103202fa6953fc77d2e9f05c60
font_01_sfnt_off000129eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EB 10748 bytes
SHA-256: 7911b186350d820b35ae788bf9bf3c011600320083063bd0cdf18be174d7f871

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