Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f287c50b32b9b4…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 07:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9df81ecd04f1bc2e1316309afea8df98 SHA-1: 6f36ac9b848781884c1f36539e3efe6eb4cd1a17 SHA-256: 00f287c50b32b9b4652249625b39abd9d0cfbff8f43736e782ef6e6b8eee7ea4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to potentially compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://ayurveda-shiatsu-qigong-nice.com/upload/files/duzazogonaputofab.pdf In PDF document text
    • https://hsiaoying.com/userfiles/file/parujuza.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613e79f784292---97567928963.pdfIn PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/mavitujelewodaxil.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/18761028317.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/88375954051.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/mabukefunopomoriwo.pdfIn PDF document text
    • https://datenglagi.com/contents/files/43740103767.pdfIn PDF document text
    • https://novsport.com/content/File/62250854199.pdfIn PDF document text
    • https://securitydm.net/slicice/file/duvekutibifake.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/735d0fdf41120a2fdaf903c9a5d17bb9/59345722977.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/filebijevusuzeginosokatin.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/91660650626.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/26017079488.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/worelawixat.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/7995065263.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/garewuxepab.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/32956e68ba003c74c847745404c7b486/lidupi.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/gonupurotuwipepadeza.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/semotiweginimitiwidinanoj.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/30535332584.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/gafamedenamikiri.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/69810050623.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=mortal+kombat+11+apk+modPDF 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_off0000d80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80A 10336 bytes
SHA-256: 1386a10e2de66c197e626c06e653a44853d46fcd1b2ae8388c326452b6413047
font_01_sfnt_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 18220 bytes
SHA-256: f9690fb283b67077975408169d300191dce95ec4fe74bf98402ce7419f4afff3
font_02_sfnt_off00011e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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