Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1cc6718c11dba9a…

MALICIOUS

PDF

60.7 KB Created: 2021-09-30 12:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 62562f0bec8979ec27989bcdc7e01778 SHA-1: 7ddd2e8cbf99e4a0066d2f234690c06ddea12425 SHA-256: f1cc6718c11dba9a2227a476db093597e1d606e94a00da23b76ae3ae243f89b2
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as a phishing lure due to its small size, image-only content, and embedded links pointing to potentially compromised or disposable hosting. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were directly extracted, the PDF structure and link farm heuristics suggest it is designed to redirect users to malicious sites for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5277

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 60 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jeanthompson.nl/ckfinder/userfiles/files/selogetoxetivukorulup.pdf In PDF document text
    • http://105chers.netsociality.com/upload/files/pivixixu.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/zukoka.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/64652614311.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/bafixovupadivifupazuvotov.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/98681802862.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/zaruza.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/55365961092.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/25828611547.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/xaruwezizin.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/f77ee986a24d9594f5589a94ba415302/tikopuxugeg.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/7051993570.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b4267d4de7---suzidofikij.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/vujipadamigut.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/208ce90ceed6a4d2f1a87c65694fee14/79572613473.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/kajobogij.pdfIn PDF document text
    • https://pindimana.in/uploads/file/77277195483.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/161030335135.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/nedevapupipogupuxezitawuv.pdfIn PDF document text
    • https://ms2gacor.com/contents/files/jebujitubukan.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/43819141958.pdfIn PDF document text
    • http://canadianrockies.info/files/file/42833600181.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/161339553350e1---radatofezarurenemu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+update+android+tablet+to+jelly+beanPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0A 10780 bytes
SHA-256: 4f173580ffd0d4c00a28b9989683818f7e6582051a5c50f6ba559c96c22b7637
font_01_sfnt_off0000c6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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