Malicious PDF — malware analysis report

Static analysis result for SHA-256 8488d13568a53e5d…

MALICIOUS

PDF

68.9 KB Created: 2021-01-31 15:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5a4c00c7c5fa28aa3fbfffa26e3909c4 SHA-1: 04eaf7906302008aad90d53aee8b2b47209fdee9 SHA-256: 8488d13568a53e5d16712826577da2aa090693e6ed5adc70708b08e2ae43aeec
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-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://druttle.ru/123?utm_term=formato+certificado+de+adopcion+de+mascotas PDF link annotation
    • http://tranquils.space/lepododety1x.pdfIn PDF document text
    • http://topmassage.net/responsabilidades_de_especialista_devq876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423155/normal_5ffe170bf2556.pdfIn PDF document text
    • http://bt-management.website/como_consultar_o_saldo_do_cartao_rapido_luxofrbzu.pdfIn PDF document text
    • http://weinmvc.net/kifesapudixelo055c1.pdfIn PDF document text
    • https://saxarewuvopa.weebly.com/uploads/1/3/4/8/134855039/gukuwililavu_rokenapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459341/normal_6012b33f803a9.pdfIn PDF document text
    • http://allieshouseofhope.com/skater_sasha_crossword_cluejngr8.pdfIn PDF document text
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/7161781.pdfIn PDF document text
    • https://remurefovedelag.weebly.com/uploads/1/3/1/8/131860204/839051.pdfIn PDF document text
    • http://subbellassecret.com/fegewivugegofetaregq54t3.pdfIn PDF document text
    • https://tolawururajetam.weebly.com/uploads/1/3/4/8/134883146/5413266.pdfIn PDF document text
    • http://medupaj.iblogger.org/bemijosoribij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sudogirelokuf.epizy.com/27546353.pdfIn PDF document text
    • http://dulefuzobov.rf.gd/instagram_follower_bot_v2._6_free_2017.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_off0000cee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE0 5224 bytes
SHA-256: cee9559eb0a23152063d18cc3d507e743a4622197ff1b31dd8153d2732e62c54
font_01_sfnt_off0000e08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08E 11176 bytes
SHA-256: e843c9a8a1e0a850a6a3aef4f399964720c5df93c8c58edcc677457c9ca9efd4

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