Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a886bae7256232…

MALICIOUS

PDF

82.3 KB Created: 2021-09-21 14:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 032de4d779d3562290c749bcd22c48d7 SHA-1: 26496aaba7593f0706860117715cd7306512def7 SHA-256: 00a886bae72562329b6ecda9db4e7c9e092b3c0102173f0e5860b23972700d72
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on potentially disposable domains, suggesting a link farm designed to deceive users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://astorandblack.net/emailer/userfiles/file/dokulaxugofetedojivi.pdf
    • http://faradbox.pl/files/file/gulodupuditaginitezigi.pdf
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/sefepevutoreramuf.pdf
    • https://beautifulhairstore.com/upload/files/jejimelosugiduvi.pdf
    • https://grafconsulting.pl/Upload/file/41992429685.pdf
    • https://naucharts.com/ckfinder/userfiles/files/60592526916.pdf
    • http://meskerjager.nl/media/files/70266392037.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/p1s047leid5p73c8d0203qo6m5/wuzifetutunosoketan.pdf
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/xanusofidiju.pdf
    • http://pieseclimaauto.com/files/file/fovemu.pdf
    • http://tovicetour.com/FileData/ckfinder/files/20210913_EABB09391790FEAD.pdf
    • http://yuemeism.com/uploadfiles/files/2039435411.pdf
    • http://gshosnab.ru/userfiles/file/pugokine.pdf
    • https://cargotavio.ru/files/file/rawimufu.pdf
    • https://carsen.sk/editor_uploads/system/files/77988075532.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/snf3kn7khoupqpulnuq32262ko/ximijebokoxaxem.pdf
    • https://1snrpaulista.com.br/ckfinder/userfiles/files/texexonotelutotugi.pdf
    • http://pijntherapie.be/uploads/files/gevijegelom.pdf
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/42853489344.pdf
    • http://phukhoabacninh.com/images/files/kilajebodu.pdf
    • http://nscenter.cn/upload/files/jakiwozaxemumuwagidikum.pdf
    • http://skonasystems.com/userfiles/file/mitoretarewawo.pdf
    • http://latiendasegura.com/contable_prueba/userfiles/file/jarapoxatebifinukokajifip.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=frp+bypass+remote+gsmedge+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dabc.bin
ca666509822fbc2b4429e9e7514050831574ecba6232883dfcc663f9434786b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDABC 18548 bytes
font_01_sfnt_off00010b02.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B02 16792 bytes
font_02_sfnt_off00012319.bin
57aee4cc3af5ef55e4c94c4fca759ee01bc54498638663a2ed0757aef7a3d898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12319 10816 bytes

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