Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbec53761ac44380…

MALICIOUS

PDF

83.6 KB Created: 2021-02-24 21:57:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b0c7d599fb527e6eaf9d8a910ed1c835 SHA-1: 05c35166c740affcdcc13a9787d496f6c4cffc89 SHA-256: fbec53761ac443809629b31aa14b35388520bc001733badeb5479caaa0425b9b
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The PDF contains a large number of external links, suggesting a link farm or redirection mechanism designed to lead users to potentially harmful websites. While no scripts were directly extracted, the presence of external URIs and the 'PDF_SEO_LINK_FARM' heuristic strongly suggest an attempt to manipulate search results or distribute malware via these links.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=public+relations+school+requirements PDF link annotation
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/sutowe.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/gdf6dqS/spanish_christian_music_worship_songs_with_lyrics.pdfIn PDF document text
    • https://sikegupul.weebly.com/uploads/1/3/4/6/134681682/womozomop.pdfIn PDF document text
    • http://marinarus.space/90802530153izj05.pdfIn PDF document text
    • https://tafanavudijis.weebly.com/uploads/1/3/5/2/135299899/kawomaruviselevutena.pdfIn PDF document text
    • https://gixebodaloru.weebly.com/uploads/1/3/1/3/131379223/kaden.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/fQria0K/rockstar_event_management.pdfIn PDF document text
    • https://xulavuxedipi.weebly.com/uploads/1/3/4/0/134017657/zajagefexo_wetipimume_nikafutizun.pdfIn PDF document text
    • https://tolonatapuxid.weebly.com/uploads/1/3/4/0/134042297/moxebeziz.pdfIn PDF document text
    • https://jajatimipe.weebly.com/uploads/1/3/1/4/131482958/nugumuvurileja_tizogax_mutazi_miwojetowuza.pdfIn PDF document text
    • http://instapodarok365.site/faguzutalumow94zsi.pdfIn PDF document text
    • https://fitulepam.weebly.com/uploads/1/3/0/8/130874207/xusagev.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/kozibowisenatu/23547136249.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/gatedetinulanenap.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/42909870628.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/annamalai_film_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/ccna_filetype.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_off00010988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10988 5304 bytes
SHA-256: c13186692a65fdea6593a78866a408007d60f2ffe101712183a6af3c741806c6
font_01_sfnt_off00011b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B68 11036 bytes
SHA-256: 9f0a9625ccf6dd01bfd53edc9b9e7c168de8325e0185c2ab2b0e4ca3502828f5

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