Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa027ee544a69e5f…

MALICIOUS

PDF

94.2 KB Created: 2021-02-27 23:56:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8cc1d8acda6fe3b4cc64c6222eff6bee SHA-1: 71bc4164599bb67c2c9cf52472b36bf76df87f4c SHA-256: fa027ee544a69e5f9da550a9020294a60f8131466a0e740b7789057cfff4237a
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, with one prominent URL pointing to a disposable hosting domain, suggesting a link farm or phishing lure. The PDF structure and embedded content indicate it is intended to redirect users to external, potentially malicious, websites.

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://lozipotod.ru/123?utm_term=rosicrucian+monographs+neophyte+section+pdf PDF link annotation
    • http://cesaregaspari.com/vezimomikutotuocnb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402507/normal_5fd16d9bbcfcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488809/normal_5fce5f7af2698.pdfIn PDF document text
    • http://vizionsmc.net/iphone_assistive_touch_apk_for_androidqp3c8.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/jegojefpxbf9.pdfIn PDF document text
    • https://luvisusarav.weebly.com/uploads/1/3/6/0/136011852/pewuza-gipid-pakimo.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/kevudot.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/asus_m5a78l-m_cpu_support_list.pdfIn PDF document text
    • http://hookup154.fun/xiluvuxunaxexufxkhe5.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/poxudan-xaruwegax-vudumukaw-kajipopeb.pdfIn PDF document text
    • https://vinozesuwoda.weebly.com/uploads/1/3/4/6/134685541/wutigibebiwatazuva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/11855459844.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/how_to_do_rotation_on_a_graph.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/android_aosp_keyboard_github.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/how_to_tell_how_old_a_marlin_336_is.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/panolinukaneluwudu.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/30520351528.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_off0001322c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322C 5644 bytes
SHA-256: 060688aed9a2642b061ef98bbde3e9933bf31382170f4b719b5769cb59dbbb1f
font_01_sfnt_off00014544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14544 11472 bytes
SHA-256: 30d84877e7d4d87555fadfdf9ca218110b7c8f0583ff2d6b64351c0764058d8e

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