Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a2bfcb6dc76655…

MALICIOUS

PDF

84.7 KB Created: 2021-06-26 04:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9d3ab4977652bcfcf12d8697b678a056 SHA-1: 30d84692f415777f2ec54af7e12109bd11694b6c SHA-256: 98a2bfcb6dc766550d21c4fb954bcffc079b41b62ab6655d3b8ab27ff450ae7b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, consistent with a spearphishing attachment delivery vector.

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://crysiq.ru/uplcv?utm_term=log+equation+as+an+exponential+equation PDF link annotation
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608265d79efc2---65645005293.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/8d0931225b0511058793063e85afb819/63756249712.pdfIn PDF document text
    • https://etadelloro.it/images/file/retemidejumuzikojomopatef.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/bkuh83k4g76k8f56f64mg4q7e3/monazud.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/tk4lh6ru8n700u1n33b5uoh5aj/85881592971.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f152210a44---34236316149.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9c1c1235c---negijinetugigawenir.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.info/upload/files/bubodo.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/op5h2743e930aitt5n35gnjfl4/tanumifaziwusavijaw.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/jpq63u2jrr1f38s2b4ifasae04/69043275299.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd0b20291c---fofevavupiwexisovadow.pdfIn PDF document text
    • http://nature-revive.org/files/file/lakimidalu.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/1458324039.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/o977m6k29u7p0lss24gdbdk3n4/11893979032.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16204359390678.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/c7336bc952fd175b1d7ca99d77582ea7/lagoziniseximaxamowuve.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/kepopajumazamixifalope.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/27459233415.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/e9b4c6b24e539d22b9030f089cf37028/zetumaloxa.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/ferofumagekuledepaleji.pdfIn PDF document text
    • https://congchung7.com/upload/file/67684539062.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/totakupenukeko.pdfIn PDF document text
    • https://ebooksweb.net/files/file/9640890694.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/nawirevabajabosaxupojar.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_off0000e84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001005f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005F 16936 bytes
SHA-256: 78d68f0622914bf54938e66db8ab0667e786a171bebfc3b2768767f6602f56eb
font_02_sfnt_off00012cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF8 10632 bytes
SHA-256: 4c86f6b6f305a43f5a4fd641fbe7e1e15c854cf515c0c6a44022b61014baa4b4

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