Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0488dfc41f8b028…

MALICIOUS

PDF

76.3 KB Created: 2021-03-19 23:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1e028f7ec05e2297fac840b123b46f10 SHA-1: 23cb462c5185bfc583cbecd83d41a8fdf7ab14b3 SHA-256: e0488dfc41f8b028df3d6c8408a1748e209f80f56eb0a9b805f59e41f01ff714
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a potential lure for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=how+to+do+a+circle+map PDF link annotation
    • http://japamawosoj.mygamesonline.org/suwulemum.pdfIn PDF document text
    • http://itasummer.fun/vipuxulidirujufasugariku2j8h7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449395/normal_6054440810063.pdfIn PDF document text
    • http://posadukik.getenjoyment.net/sql_queries_tutorialspoint.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/aoac_moisture_determination.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452587/normal_6035790266d57.pdfIn PDF document text
    • http://fruitik.space/accountable_talk_stems_high_schoolyg4hn.pdfIn PDF document text
    • http://theharaka.online/accellion_secure_file_transfer_user_guide7hk3w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426277/normal_60438619328b2.pdfIn PDF document text
    • http://nukapag.getenjoyment.net/kotadaxapejavipis.pdfIn PDF document text
    • http://theharaka.online/5594559522023glu.pdfIn PDF document text
    • http://tomogorman.com/residential_lease_cancellation_form_texasf24fj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/17494157969.pdfIn PDF document text
    • https://88de2f60-87cc-4e64-9bfa-6089ba8aa8b5.filesusr.com/ugd/2d797c_bd13c11ab3944dd1a46fe9abebd63dda.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/welekaduterukafo.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/12899096939.pdfIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_4d30a2a15bc7479ea647729114e41185.pdf?index=trueIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_fdf7407388e643afa9afed0f64cb4904.pdf?index=trueIn PDF document text
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_b0fdd8e55b5d404c91ec4e4bd5b4c0b1.pdf?index=trueIn PDF document text
    • https://bf5f3f24-cfb9-4aec-9f01-83e6d863dc5b.filesusr.com/ugd/1f4526_d8f09d78cddc40d8a2c2620a05fef9c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xezonijida/adding_and_subtracting_fractions_with_unlike_denominators_worksheets_with_answers.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_off0000ead5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD5 5096 bytes
SHA-256: 1f0130d85f9a764487977558bf4ee772bc5d8bda7f0a190e3924e7b9d3ac4a95
font_01_sfnt_off0000fc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC21 11304 bytes
SHA-256: 3567adaf180a1d91016d6f77d76f95236c2e2ee16363b5ecc97d52c4d0e435fd

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