Malicious PDF — malware analysis report

Static analysis result for SHA-256 482f2b9c75daa0f5…

MALICIOUS

PDF

72.7 KB Created: 2021-03-01 00:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f444f376b71da0f19488ec213a9e3101 SHA-1: 786c11e71f7503d7ad0d39f787d34e0849854e5c SHA-256: 482f2b9c75daa0f5573434173f20971befc0d308273e2b1d79167febf1bd0fe9
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to 'lyrics download' and 'wkhtmltopdf', which appears to be a lure to direct users to malicious websites for potential malware download or credential harvesting.

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/award?keyword=seven+years+old+lyrics+download PDF link annotation
    • http://fb-pageunderreview.com/bass_guitar_tab_sheet_musicrzipf.pdfIn PDF document text
    • http://xakojudanek.66ghz.com/fofap.pdfIn PDF document text
    • http://thelandofbadideas.com/siluxulo11mjx.pdfIn PDF document text
    • http://hurleyshamburgers.com/halo_ghost_of_onyx_espaolwoxjv.pdfIn PDF document text
    • http://useporte.xyz/36861837431uimnj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499285/normal_603552e294f4a.pdfIn PDF document text
    • http://smartycredit.info/nusagirelapipujevarenirsxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454558/normal_5fe05e8335904.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463803/normal_5fe247aa82666.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/LQbhhbk/hallmark_movies_now_xfinity.pdfIn PDF document text
    • http://vubureteka.22web.org/avantika_express_indore_to_mumbai_platform_number.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/Jiijcaw/mishary_rashid_alafasy_nasheed_muhammad_mp3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5fd136df7b57f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444850/normal_5fe4645889f90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lakovejaduga.rf.gd/31267741154.pdfIn PDF document text
    • http://gimezevu.epizy.com/sultan_bengali_movie_video_song.pdfIn PDF document text
    • http://texatopewewew.epizy.com/vepizot.pdfIn PDF document text
    • http://keguwaburafokul.epizy.com/ibps_po_online_form_fill_up_2018.pdfIn PDF document text
    • http://bitujavoza.epizy.com/bein_connect_apk_cracked.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_off0000dfd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD8 5288 bytes
SHA-256: b0a2d126bb1e0d1404bd98d7506801d3a8da74be4aa5aee7ec023855256f9faf
font_01_sfnt_off0000f1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F8 10536 bytes
SHA-256: b7c574ef5b1f6dd5933cbee22cf4bdd9b3f627f42954b0fb43f9a0efa54b98f7

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