Malicious PDF — malware analysis report

Static analysis result for SHA-256 32036e4b1ac4910f…

MALICIOUS

PDF

105.2 KB Created: 2021-03-31 11:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 772553a47d09a52997e989bc85de6244 SHA-1: f8c4d7e6de08fe3147875d5f411411618bd0e911 SHA-256: 32036e4b1ac4910f597f8b26b5ec3c6498c1b3f466772dd9d6b9038218bc2dfa
134 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to downloading a PDF, which is consistent with the external URI pointing to a download link. The presence of multiple disposable and link-farm-like domains further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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 https://ponafet.ru/award?keyword=holy+bible+sinhala+pdf+download PDF link annotation
    • http://lidisafudototi.iblogger.org/35871734795.pdfIn PDF document text
    • http://lopavatizurafe.iblogger.org/interview_answers_interview.pdfIn PDF document text
    • http://tobufasir.iblogger.org/selenium_xpath_questions_and_answers.pdfIn PDF document text
    • http://munivujikax.22web.org/electronics_projects_magazine_free_download.pdfIn PDF document text
    • http://gejejok.iblogger.org/funifaxonutif.pdfIn PDF document text
    • http://serunowatavad.iblogger.org/zuwinisapunesuvu.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/buwosevax/wetiduv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a489d8-a480-4aa2-95b7-5fac74cb1cf4/optiplex_755_release_date.pdfIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_9359af1052d3454b8ce3317f65f8222e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb80a139-f68e-4f0e-973d-7900f9d12253/raweloxibobabul.pdfIn PDF document text
    • http://ramejepazino.rf.gd/44061638543.pdfIn PDF document text
    • http://zigimavabixexib.epizy.com/rewefulusikowitakafoke.pdfIn PDF document text
    • http://nanojali.epizy.com/50568185021.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/31409364437.pdfIn PDF document text
    • http://tofezigiserix.rf.gd/gixopudusugerodulinefu.pdfIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_eb01b11d801142e5b1b940d03a4c0bb9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patilawasu/lugakubi.pdfIn PDF document text
    • https://8459f3b7-b2e6-4b58-af31-5f29adf293b7.filesusr.com/ugd/a68450_30d3489f0e1e46d4b7ab681563203aae.pdf?index=trueIn PDF document text
    • https://680e7e7f-99bb-4309-8a01-ecc910dc7690.filesusr.com/ugd/717a42_cc680c8fc4b944c5a02dffe674dc0675.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lewuli/what_are_the_twins_names_in_the_shining.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/how_long_to_beat_diablo_3_eternal_collection.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
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CA 5328 bytes
SHA-256: bdcbc52e80bc2d574217711275b7f56843f5ea07e83fdde1ab981a768daa884f
font_01_sfnt_off000105b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B9 37608 bytes
SHA-256: 61f6945d753e5af133f16cf8693fb43c86ee2b0043ac9ecd4b409a578d7feeab
font_02_sfnt_off00015941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15941 11780 bytes
SHA-256: 1dcce990c9566c5cf6c5282b194767c8a948025dbc513319c99d130792e4d6d6
font_03_sfnt_off0001818d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1818D 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61

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