Malicious PDF — malware analysis report

Static analysis result for SHA-256 200f5fd04f6b174c…

MALICIOUS

PDF

80.0 KB Created: 2021-09-19 06:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d171c2742bb2c26dadcabde9ff317a78 SHA-1: e582b457e010bf624024bbe84fc8f01249a75d49 SHA-256: 200f5fd04f6b174c8ccb03bf05dc981b001537fcaa69f4fde0febf01fb43148e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. The presence of a 'download button' lure further supports a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://infrive.ru/uplcv?utm_term=uc+email+android PDF link annotation
    • http://kimwendelldesign.com/ckfinder/userfiles/files/82563694581.pdfIn PDF document text
    • https://stancijanegrin.com/userfiles/file/17758251262.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/37516773938.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/56719861800.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210904160716.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0b9603033---puwegejagakogexafexezi.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/4776582862.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/12910139525.pdfIn PDF document text
    • https://curtain.jinware.com/upload/files/47461528895.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/rizerewezavewomuv.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/tepumumuvudixer.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/vhifnv8tguu600t8akut1m0do1/36529036311.pdfIn PDF document text
    • http://www.onlinenieuwsbriefversturen.nl/gebruikers/afbeeldingen/61956760209.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/butelu.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142d1f4d6b6d---77450356881.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/48110231409.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/muginu.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210916094933.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/49667887892.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/3ba059e943cc499b8f2d3d5b6871fece/gurugisekojevew.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/kowofujanamiwunu.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/45374312091.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder/userfiles/files/84877845380.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://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_off0000d26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26E 19148 bytes
SHA-256: a36b9cd3c2d55b6aea795abcf5ba658ccd48d3462edfd2ded1f3e9324ffa3ea6
font_01_sfnt_off000103f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F0 10272 bytes
SHA-256: 61cabfdbc636128d18c26ffa3d30c2458c901d6d7b361d10ce311c0261dda52e
font_02_sfnt_off00011ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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