Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee94635891928716…

MALICIOUS

PDF

71.7 KB Created: 2021-09-23 19:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 15317ea7b4888ae3c1cbfc229b7bd98f SHA-1: 9f6e89cf142f3838389679e759a3d8749df557de SHA-256: ee946358919287164c2c3dba582095965d9f4bd3cbbc457115e606b65ce0b48c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the links and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • 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
  • 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://uts.edu.co/portal/app/ckfinder/userfiles/files/47066621621.pdf In PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/1527930605.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/putaxupinukeverozudatitof.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/dudosovurozebum.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/zurutaxurute.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d93a0bceb---21253300215.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/48301704966.pdfIn PDF document text
    • http://faradbox.pl/files/file/56783030275.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/pugokazodejipadeje.pdfIn PDF document text
    • http://aimic.com/userfiles/file/28976907014.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16136a1d2cd947---92158311053.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/ovha87chddkll9k39dvigsf0h1/xivurizuxutusavatoxefefa.pdfIn PDF document text
    • http://someteme.com/archivos/_20210918122550.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/79180451249.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/rasajupebajizizeliveba.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313d7b8e09f---fewunujubepoxurubotul.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3fc124f79---ganeli.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210914073736_eke1jb.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/baea3aeabcfde1d1cc4f8d7520e784bc/41924800103.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/juvodixeku.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/62214000951.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c8fc876739---77580990291.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/saxekimusefolejaf.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/37391094312.pdfIn PDF document text
    • https://edgecs.com/documents/wagefavomamekasofoziwoz.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/ae8055f224450ada22a5166c9b9918b2/butevuxugepef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+get+free+skins+in+fortnite+season+6PDF 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_off0000b9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D2 15224 bytes
SHA-256: 2ed6b1d99f078cdce2d0dc4076a0d7b66033f45d057e5ae74af9a0b6d42b4d30
font_01_sfnt_off0000dfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD2 10680 bytes
SHA-256: 897b9f8a98ff5f682f57d443090ee1c654bf837bab8b5129a6e2590494180d1d
font_02_sfnt_off0000f88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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