Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f67520728b5506b…

MALICIOUS

PDF

74.4 KB Created: 2021-03-24 21:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1909f437d11827b4625e14d8e3306afd SHA-1: baac98074a0ef85f19345f97fe9cf577e29903ee SHA-256: 2f67520728b5506ba19290daaa0a9520e45f34c5aca49a09200947c5b48895fc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/award?keyword=capitalisme+financier+pdf PDF link annotation
    • http://steelsho3.club/brinkmann_smoker_grill_manualzvci3.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/fogfpN5/27765619779.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/Ohbhehh/wawaso.pdfIn PDF document text
    • http://nesapumedavemag.iblogger.org/dancing_on_my_own_ptx_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454684/normal_6023e5253b588.pdfIn PDF document text
    • http://tiktoktop.design/xosonedapaxivi29zw5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413121/normal_6040d8c3c095b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414679/normal_603c80b87a33d.pdfIn PDF document text
    • http://medyayazilimtr.com/4294350710045fz6.pdfIn PDF document text
    • http://berkeciftci.net/niranipugajufijoxekinukibqfsgu.pdfIn PDF document text
    • http://ridunculus.com/trigonometry_problems_for_class_9ut7lt.pdfIn PDF document text
    • http://instacopyrightcenter.com/258428694786dg46.pdfIn PDF document text
    • http://cleaner360.shop/93575116788utjnu.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvezunotumu/cgcygcn/codecademy_python_tip_calculator_answers.pdfIn PDF document text
    • http://zinuvudoliku.iblogger.org/marley_and_me_full_movie_download_720p_in_hindi.pdfIn PDF document text
    • http://grenkasalo4.xyz/ff14_fieldcraft_demimateria_3_farmpo7c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tavarifa.epizy.com/buku_belajar_bahasa_inggris.pdfIn PDF document text
    • http://nuvafakidem.rf.gd/moxibabolovorewizoxejopow.pdfIn PDF document text
    • http://kepetexune.rf.gd/48942270548.pdfIn PDF document text
    • http://norabasuluvo.rf.gd/60218151615.pdfIn PDF document text
    • http://wobuwikag.epizy.com/13988748911.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_off0000e4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FB 5208 bytes
SHA-256: f1feccf4ffc6dd6ce3be00d1ebc472bf0cd8aba8f0b4b1ae8c77f28d71571ea8
font_01_sfnt_off0000f694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF694 10936 bytes
SHA-256: c1047a35334cb51f3feb829418d0a7a9d27347718dfdc9bfe543b0dabf27c4eb

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