Malicious PDF — malware analysis report

Static analysis result for SHA-256 be215032c1fa8f22…

MALICIOUS

PDF

82.0 KB Created: 2021-09-22 17:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8422e7dd7609b00853f640e465335cf2 SHA-1: a2471ab88a39d2cdcf4361ec57516dd798a3a42b SHA-256: be215032c1fa8f226f23a7716df0daab022de9ad3e2df9c12c20676f65741af8
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable, but the presence of a link farm and the high confidence malicious verdict indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://laborke.ru/uplcv?utm_term=final+fantasy+3+snes+rom PDF link annotation
    • http://a1-automotivegroup.com/upload/files/girobafiguxiguwokepawez.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/146d7753a14e4af31accd32f3eb8b739/nululowajedosivisoxupuli.pdfIn PDF document text
    • http://kkslavicin.cz/sites/default/files/file/lenitatasaveroxejuxiz.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/9619100940.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/90349303611.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/83477248880.pdfIn PDF document text
    • https://cmf8.ir/data/file/famimosotiz.pdfIn PDF document text
    • http://qianshunqs.com/admin/upload/85794819379.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/fukazazameliduwum.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/45599712058.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/33451148368.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/18992844165.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/38535583565.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/48790690891.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/22112468238.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210910_6B9D9C7AFB02B12D.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/givolupexin.pdfIn PDF document text
    • https://sananselmo.com/wysiwygfiles/file/56152493652.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614018bf7e969---6158776541.pdfIn PDF document text
    • http://grupophi.es/uploads/files/ravujowuxe.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132080e86bec---vebedofoseteruk.pdfIn PDF document text
    • http://velisend.ru/photos/file/tonuwanunifireka.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614a44068009c---96250099706.pdfIn PDF document text
    • https://termoformat.md/img/files/55964795420.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/xudabefazalo.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_off0000db12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB12 10640 bytes
SHA-256: f319d457e37890753e4f4b5ca589e3ccb4b5b9871d58f466c98e29cde3693a29
font_01_sfnt_off0000f376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B88 18088 bytes
SHA-256: 98067f6a1df33239827e7c3ee1839facc6e989207e42c2606664728da63b103d

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