Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a498cb08c3d9d0…

MALICIOUS

PDF

69.9 KB Created: 2021-09-30 10:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ecc5a08d6b8660be88e04424a66f1ee8 SHA-1: 6f39d7469d25b0085d0b6051d1c42ff7b115e35b SHA-256: 32a498cb08c3d9d04e8ce5759e7f26a9ef8649eab5f61dfd39d7509aba1c4da3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it is designed to redirect users to potentially harmful websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm structure likely used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://olynskiconstruction.com/pics/file/63401093148.pdf
    • http://erbamedica.org/userfiles/files/89133459635.pdf
    • https://southafricapools.com/contents/files/53373977498.pdf
    • http://britishcytology.org.uk/ckfinder/userfiles/files/gugilodabujuguvawom.pdf
    • https://grandhotelushba.com/userfiles/file/barativodu.pdf
    • http://skulpt.in/admin/uploads/file/zagowidatuliropigedorot.pdf
    • http://yotlist.com/uniformkontakt/userfiles/image/files/pusikijutebewivaxo.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/df6aee3d53b57499a83ca6f919e6d80c/gixikaxaparajibi.pdf
    • http://kingkady.cn/uploadfile/files/6914120425.pdf
    • https://majubesar.com/contents/files/72798689856.pdf
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/46451754798.pdf
    • http://mottaing.eu/userfiles/files/42016863167.pdf
    • https://andhimazhai.com/images/files/zarafo.pdf
    • http://clingac.es/d/files/juzolaxukopawejapikifaxa.pdf
    • http://hoanggiaphatstone.com/upload/files/bebexejijuku.pdf
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/wokiwaseja.pdf
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/jaraxanijilaxisedojux.pdf
    • http://nationshield.ae/userfiles/files/88643690651.pdf
    • http://thcscatquea.hoaiduc.edu.vn/ckfinder/userfiles/files/bidugojosonafivuxaro.pdf
    • https://underworldgear.com/admin/images/fckImg/file/9133884030.pdf
    • http://tractortools.cz/ckfinder/userfiles/files/5006666530.pdf
    • http://auroraenergyproject.it/userfiles/files/33248290407.pdf
    • https://alohasafaris.com/files/bamobimepizak.pdf
    • https://dhesient.com/media/21384128152.pdf
    • https://wietsevoermans.nl/ckfinder/userfiles/files/66221124053.pdf
    • http://vansuloi.com/uploads/userfiles/file/xakojinoje.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=pokemon+quartz+rom
    • 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_off0000b4f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F7 16792 bytes
font_01_sfnt_off0000cd0e.bin
eef7c5074dd064c960aeb8c8163c0261999dcb03dcd1b9e9ed5649e53cce8a10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0E 10364 bytes
font_02_sfnt_off0000e486.bin
80c0ad59232407cd69bdef931499cde3521bc3f941203685a9c52c663a1ce881		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE486 14912 bytes

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