Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74b4679030e14af…

MALICIOUS

PDF

92.6 KB Created: 2021-03-15 16:29:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f3960aa0a34b1820fa1f13392af6baa7 SHA-1: 1dc07dbb5efff150f3098247b86643d99c91452c SHA-256: b74b4679030e14af5c693bc46e6edf304cd9f4f170f3f4f90947b510906fa067
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 phishing or trojan payload. It contains numerous external URLs, with a primary one disguised as a search result for a book title, likely to entice clicks. The PDF's structure and embedded links suggest it functions as a lure to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=adorno+the+authoritarian+personality+pdf PDF link annotation
    • https://cdn.sqhk.co/mutexeze/Oibhf8C/54378221551.pdfIn PDF document text
    • http://nawitebexu.medianewsonline.com/ielts_reading_worksheets.pdfIn PDF document text
    • http://gaxenop.medianewsonline.com/cellules_gliales.pdfIn PDF document text
    • http://vukosodo.iblogger.org/how_to_study_pharmacology_for_nclex_pn.pdfIn PDF document text
    • http://itsamorem.com/vepumedawb7unw.pdfIn PDF document text
    • http://cocobuka3.xyz/mandated_reporter_categoryx1l0f.pdfIn PDF document text
    • http://abwaab.su/infection_control_guidelines_for_residential_aged_carepqybs.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/aiekgdX/8105065350.pdfIn PDF document text
    • http://zebrait.fun/nalufobozazizalajap9gatl.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/hjeccOa/jegasenu.pdfIn PDF document text
    • https://cdn.sqhk.co/rudolikube/gVYjh54/rootless_pixel_3_launcher_xda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_c3ed9d1c8a0d40c1ab5a9e483661fd13.pdf?index=trueIn PDF document text
    • http://kowelakava.rf.gd/blah_blah_blah_lyrics.pdfIn PDF document text
    • http://fikelamizogu.myartsonline.com/55549576267.pdfIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_f5ea656f204c4acf9c7cbc2e118f88cf.pdf?index=trueIn PDF document text
    • http://xarujubapemir.epizy.com/dujirotawolinamegufom.pdfIn PDF document text
    • http://punegejofuj.epizy.com/korean_visa_application_form_philippines.pdfIn PDF document text
    • http://tajegigug.epizy.com/56111693342.pdfIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_bc2eb6c550e949a495d1b777afb1f8a6.pdf?index=trueIn PDF document text
    • http://luwidegudaje.epizy.com/arthashastra_book_in_marathi_free_download.pdfIn PDF document text
    • http://tuzotulerijenej.rf.gd/vidojapanojekadi.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_off00012d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D83 5220 bytes
SHA-256: 4da615efe83b5e00767d0f2ec66dc6c9c76db2cbc08ad04f5d2a244d16cd0ad6
font_01_sfnt_off00013f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F4B 11016 bytes
SHA-256: adaa7f046dd0c2df9c74f8eda3b30a5c75cb5ae99b6cda826ee99375f2e27da8

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