Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9e9ad0957317bb…

MALICIOUS

PDF

70.7 KB Created: 2021-03-05 06:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2d660d43ebcb87ffea17ef18435f8fdc SHA-1: 4fe360280135efaf83ce86434df3ec4f6c73e9d2 SHA-256: eb9e9ad0957317bb8e0333d5e0b28dbb9d6df46fedb998df0924f764988590c3
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting it is part of an SEO spam or phishing campaign. The document body, though heavily obfuscated, contains references to 'Twitter tweet template psd', indicating a lure to attract users to click on the embedded links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/123?utm_term=twitter+tweet+template+psd PDF link annotation
    • http://skout.tech/calculus_with_differential_equations_freeitwap.pdfIn PDF document text
    • https://wazaxilam.weebly.com/uploads/1/3/4/7/134726650/kezawolonewomom-ligakazase.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428061/normal_5fdfccd4ce1f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_601b1dc8eca62.pdfIn PDF document text
    • https://bapixive.weebly.com/uploads/1/3/4/3/134393773/wenudezuvubosata.pdfIn PDF document text
    • https://beripoxepi.weebly.com/uploads/1/3/5/3/135325525/wirob.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/U3Fhjd6/zelle_banking_app_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/9Pn4iQE/58437856517.pdfIn PDF document text
    • http://yazansoft.com/baldurs_gate_3_4k_gameplayyiglx.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/ijaXW0n/84601050233.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/gcjajhD/samsung_galaxy_s10_live_wallpaper_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475215/normal_5fc7f9788dc8f.pdfIn PDF document text
    • http://devgm.design/an_enemy_called_average_summary3fntk.pdfIn PDF document text
    • http://bestcreditcheck.info/life_reptiles_and_amphibians_video_worksheet_answersemvwm.pdfIn PDF document text
    • http://vykupavto54.ru/ytd_video_er_for_macbook_pro4qoj6.pdfIn PDF document text
    • https://cdn.sqhk.co/gefisodir/Fjejjhg/secret_codes_for_iphone_7_plus.pdfIn PDF document text
    • https://piwaxiru.weebly.com/uploads/1/3/4/8/134882920/3a5d9.pdfIn PDF document text
    • https://cdn.sqhk.co/judigirowe/4hjRsoh/niroriz.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/jhBYrjj/18159680927.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/3615ded0-eb82-45c9-b774-f898d7869443/teruxopakakidakadekuvife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c1f45d-53b2-496e-a851-5cd52cda9348/17299609602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e8cb0de-184e-41c3-bd74-26ac42da0ace/niveduvofovofujobevu.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_off0000da59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA59 5148 bytes
SHA-256: dafa2013d443600a6a7a84df9bde632ab5ef0d7bf02c26ae7c778def17425723
font_01_sfnt_off0000ebc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC9 9884 bytes
SHA-256: ff540b549b4d3322c986c7a9fc4d76defe5451c8bdeadca7eae1b2bb667c16b2