Malicious PDF — malware analysis report

Static analysis result for SHA-256 71faa6a563c88969…

MALICIOUS

PDF

73.9 KB Created: 2021-02-14 01:04:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8fcf7a4306d0a243efd0503e4c65b9cf SHA-1: 04e16fbe0525b4ed27efc1b0e724c320b6f011e1 SHA-256: 71faa6a563c8896911edba6e3067e39a8e409d97294f51395fa97ec2c7fa378b
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a primary focus on directing users to download 'pokemon tcg apk 2.73'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous disposable domains for hosting links, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://maypoin.ru/wix?keyword=pokemon+tcg+apk+2.73 PDF link annotation
    • https://bimidupixujeg.weebly.com/uploads/1/3/4/3/134319160/fozimafiba.pdfIn PDF document text
    • https://belatefa.weebly.com/uploads/1/3/0/7/130775380/36300d.pdfIn PDF document text
    • https://mesirurot.weebly.com/uploads/1/3/4/7/134706751/liguxugete_xakatemapek_buzav.pdfIn PDF document text
    • http://fruit-italy.space/streamlabs_donation_setup_mixerm9ken.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/saxalejune.pdfIn PDF document text
    • https://kuzuvofaneze.weebly.com/uploads/1/3/5/3/135394893/539170.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413231/normal_5fd09c75eced5.pdfIn PDF document text
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/reraropagarowa-lugelide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_601b982d6dff0.pdfIn PDF document text
    • http://romeita.space/free_video_editor_with_music_for_iphoneypmit.pdfIn PDF document text
    • https://vojizozovogimum.weebly.com/uploads/1/3/0/7/130740342/8686737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5fe7edd5352e5.pdfIn PDF document text
    • http://workbykoder.xyz/79476459278k8l1a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pevurevakube.rf.gd/nivonupuxer.pdfIn PDF document text
    • http://jibogifimot.epizy.com/aberturas_de_xadrez.pdfIn PDF document text
    • http://kasaxamaburabuz.epizy.com/ctet_question_paper.pdfIn PDF document text
    • http://gekazez.epizy.com/best_2019_movies_sites.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_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 5420 bytes
SHA-256: c14e6249b01d8437d3afbc25a382abb34006813d5d855c1f78d1ff57997f58ee
font_01_sfnt_off0000f57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57C 10948 bytes
SHA-256: f5e0c21adb71189b4e8b6d16e7561e7f84b2df6f35520297a0750bee70f9009c

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