Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2eaab0e3800d1f…

MALICIOUS

PDF

78.9 KB Created: 2021-09-18 05:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5cfed9401ef093f5530a89db9e4c92be SHA-1: 895c27e2a400d28004c2752ebe1e7c88412bb000 SHA-256: 8c2eaab0e3800d1f86f3eb888501075639e4e1a785684f47f7eead86ed324cd0
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to potentially disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded content indicate it's designed to redirect users to external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • 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.
  • 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://webcertain.asia/contentupload/fckeditorUploads/organization_/file/99349926182.pdf In PDF document text
    • https://faktxeber.com/resimler/files/68843912176.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1613f89f1aaf3d---xigumitumisutunukes.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/69603037442.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/98499317661.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/tiwizetilira.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/11622535340.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/lusitidagukisamux.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/xuwotetaxazekasagut.pdfIn PDF document text
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/goxizixesanovadozid.pdfIn PDF document text
    • http://zgic.ru/!upload/files/xajopotabomatim.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/20205991752.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/mipap.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/gesoligaverinizuziku.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/19642873482.pdfIn PDF document text
    • http://k1a.ru/images/files/file/jelosesadezewusabo.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/lamejupukenafep.pdfIn PDF document text
    • https://monyetmesum.com/contents/files/bexakosutuliboxo.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/64635839233.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/viwubi.pdfIn PDF document text
    • http://auto-rad.pl/userfiles/file/pujenixero.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/99044175749.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/vafup.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/fovajijefu.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/mufimimurolukifoxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=snes9x+android+romsPDF 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_off0000cec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC2 10612 bytes
SHA-256: d5c83f1cb97b5f0242abc087b77792703af544fcba51e4aac9321c6fc209791b
font_01_sfnt_off0000e702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE702 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF14 18216 bytes
SHA-256: 8cad4409e4721bde1cc014ba3ad7cf820461255d805d274b4eea4ca1d7c9470c

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