Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe0bf4fb0717279…

MALICIOUS

PDF

72.2 KB Created: 2021-02-17 20:22:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 754fb3e3003a2430f51a16908cc07336 SHA-1: 07ce370ba6c0471caa695c7e3d51b35df4df903b SHA-256: dfe0bf4fb0717279fcd63bec02c9d6c472c8bbe0f9056b7eaf3e928140f8271f
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The primary URL, 'https://maypoin.ru/strik?utm_term=why+is+my+playstation+gold+headset+not+working', suggests a phishing lure related to PlayStation headset issues. ClamAV and ML classifiers strongly indicate malicious content, likely phishing or a downloader.

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/strik?utm_term=why+is+my+playstation+gold+headset+not+working PDF link annotation
    • http://fizasibako.22web.org/23097749369.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/gzcSpE4/color_wheel_interior_design_color_palette_generator.pdfIn PDF document text
    • http://brosbass.com/79831586541rfinx.pdfIn PDF document text
    • https://pegigisujojefuf.weebly.com/uploads/1/3/1/4/131413718/7232960.pdfIn PDF document text
    • http://deutschebank-meine.com/distress_tolerance_skills_worksheetfdb6s.pdfIn PDF document text
    • https://sifavebizibi.weebly.com/uploads/1/3/4/0/134040704/3127028.pdfIn PDF document text
    • http://lnstagramcentre.net/industrial_ergonomics_guidelinesmdfsb.pdfIn PDF document text
    • http://poradoit1.site/space_engineers_large_ejectord99y2.pdfIn PDF document text
    • http://pagefufobixew.22web.org/minecraft_pc_apk_appvn.pdfIn PDF document text
    • http://creditactive.info/memalamulubuzakimajokava481.pdfIn PDF document text
    • https://dagigofeno.weebly.com/uploads/1/3/4/8/134887245/2077810.pdfIn PDF document text
    • http://tranquils.space/low_cost_flights_to_las_vegas3lgk1.pdfIn PDF document text
    • http://wumijodurixemi.22web.org/35063648117.pdfIn PDF document text
    • http://instasurprise.online/90092949551dvwmd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kejusekijo.epizy.com/top_android_movie_maker_apps.pdfIn PDF document text
    • http://venakato.epizy.com/minimalismo_digital_libro.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_off0000dc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC10 5644 bytes
SHA-256: 9d767a0bdabc86dfa048191527a54a943ffbd3da229f5418746ca46c7bff7ad4
font_01_sfnt_off0000ef3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3C 10560 bytes
SHA-256: b505c603cf9909fcae082a6257a3d08dab7e510e5d03f605a5babbbc41a68299