Malicious PDF — malware analysis report

Static analysis result for SHA-256 baec7e45d004d0f8…

MALICIOUS

PDF

68.5 KB Created: 2021-09-12 07:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9bd7710c4657255064b08659224a56c9 SHA-1: e1020bf4b97980ecf3e1c8f919b14c063c83d3c6 SHA-256: baec7e45d004d0f83e8f8311ab34ea0c9e43a5121e0ce01be5b7158a609a3afe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or are structured as link farms, suggesting a phishing or malware distribution scheme. The PDF structure itself is also flagged for suspicious link farming practices.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://sfipl.in/userfiles/file/begobiw.pdf In PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/c6e820582d59b615293a81b86a42b930/18521333264.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/1049713487.pdfIn PDF document text
    • http://www.bash.cl/media/file/dasizuselariniselopun.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/tolugozeroxo.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/17362045936.pdfIn PDF document text
    • https://tiemhoamo.tiemhoahaibara.com/data/dulieu/files/36059822964.pdfIn PDF document text
    • https://immobiliareincentro.it/allegati/file/gubolozetinino.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d7cd1796e---52931844114.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/20317821708.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/79156715185.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/93589208652.pdfIn PDF document text
    • https://finliz.lt/i/File/25674630309.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/tejobanilo.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/valojejebuvetirazix.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/wewudu.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/35842100892.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/dakupu.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/nukijupolajiti.pdfIn PDF document text
    • http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/xavez.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/tixisoginijoverawex.pdfIn PDF document text
    • https://cvssteelex.com/ckfinder/userfiles/files/gotelexozevedazakur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=accounting+information+system+james+hall+9th+edition+free+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC571 11560 bytes
SHA-256: 4f8c6076e31e8ca67df1a679f0c0bacbc82b53d3eb81295a7d6c94448d425e2a
font_02_sfnt_off0000e088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE088 14296 bytes
SHA-256: 8a42e9c53ecfd39eb36d0b3cf5ab077360971683eebaef78d136e5aef975b954

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