Malicious PDF — malware analysis report

Static analysis result for SHA-256 9476a0574d1a6b84…

MALICIOUS

PDF

118.9 KB Created: 2021-05-01 16:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ec9f6c920123ea13d86afc553e85f874 SHA-1: b4432600ae84c4cae6ad732e0c88caa82caa2de5 SHA-256: 9476a0574d1a6b842de926851c49ff1ae35542f8859e5bc8d95cd66cb733212e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a large number of embedded URIs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. The document body is heavily obfuscated and appears to be non-readable content.

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://ponafet.ru/strik?utm_term=a+murder+is+announced+play PDF link annotation
    • https://cdn.sqhk.co/sutazojawote/hciffFv/gundam_micro_wars_amazon.pdfIn PDF document text
    • http://mydenverneighborhoods.com/nizegigujutevoxonoxi09d0u.pdfIn PDF document text
    • http://tamakar.xyz/95332735866yj0xe.pdfIn PDF document text
    • http://netlysy.online/wallpaper_for_whatsapp_dp_freea7xne.pdfIn PDF document text
    • http://roskycnmx.com/54637892738xexwf.pdfIn PDF document text
    • http://texewofe.22web.org/xilurujisidobowozegab.pdfIn PDF document text
    • http://activa-fb.com/decode_and_conquer_downloadxrsjp.pdfIn PDF document text
    • http://fukikenikiru.22web.org/guvizuvi.pdfIn PDF document text
    • https://cdn.sqhk.co/lojavowi/7yjijIc/romenafi.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/tojejakezaxojujiy84on.pdfIn PDF document text
    • https://cdn.sqhk.co/fokatekox/GhekheM/wipigirev.pdfIn PDF document text
    • http://lessonsonline.site/1uobpc.pdfIn PDF document text
    • http://test123test.xyz/damivznoao.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/3f2fc96b-a95b-4f35-98a0-76ec6f6ad68a/71029394820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9fd0b60-b816-46ad-8e49-a06cd7950ee0/lupakalomezosavenevan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d45c9c9-6ea8-4789-b05c-2751ee7f2a72/lenojeri.pdfIn PDF document text
    • http://zelagipu.rf.gd/materias_de_quimica_que_caem_no_enem.pdfIn PDF document text
    • http://gukasitaxe.epizy.com/wuwinakovunap.pdfIn PDF document text
    • http://pifujisebakiju.epizy.com/cdi_ignition_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6db88f-2cb5-4315-b4db-2d4071728b26/what_is_considered_a_social_security_disability.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/918ef9b6-3e6b-4805-88ce-d7d3e80a8625/little_house_on_the_prairie_season_8_episode_17_part_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f14f773c-bf4b-4614-b353-5513a93ea37a/rokujujupagojijibejifugi.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_off00019520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19520 5308 bytes
SHA-256: 98cba6538a9945d9adfbceb415a31ecf3af03ff47fb7cd3e24b8f27cf4d6eff6
font_01_sfnt_off0001a71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A71D 11352 bytes
SHA-256: 99fd53cce741bac322d3f8b513d232982bada6af04bd9f4689f3d767ae39a1ec

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