Malicious PDF — malware analysis report

Static analysis result for SHA-256 989e347d802e1b38…

MALICIOUS

PDF

72.0 KB Created: 2021-09-07 13:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ff0adaccac0cb47d5732f070271db389 SHA-1: 4c9d25ce7b0cd77671f1c410fb48725400acf189 SHA-256: 989e347d802e1b38bcfa56b160c2170c50fad9144c30e417992770dad8553226
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware delivery. The presence of embedded JavaScript suggests an attempt to execute malicious code or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://llibreriaha.com/img/events/file/wigerojaze.pdf In PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/36944866338.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/11298032285.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/c1jkchulimr21rj5nnirr2ahgf/vilejomora.pdfIn PDF document text
    • http://apmnir.ro/fckfiles/file/7606547304.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccc92b3dba---39310086556.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/8577088827.pdfIn PDF document text
    • https://kstraders.com/userfiles/file/dopodinonoroxuwofewajafo.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/78666129411.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160982bf71be10---42452802064.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/vafumoj.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1610601e214a78---pijas.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/tanejosatugosozodejoba.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/a4a152ce06bc3b5c071759f0c9807850/pozojo.pdfIn PDF document text
    • https://moscowfashion.net/content/xuploadimages/file/37478315339.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/zudisimirafuwedezofuzixo.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/425539ba3372c44e4f341751704d6178/magiguvudu.pdfIn PDF document text
    • http://dmscsmartlifeblog.com/userfiles/files/nakubuneladimarawupiradek.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/b8264de55ee39b0a74b8d5e19e19508c/riguxisanalurano.pdfIn PDF document text
    • http://aven.su/userfiles/file/jasizumewan.pdfIn PDF document text
    • http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/vudulap.pdfIn PDF document text
    • https://vestol.bg/files/file/49956298277.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b48385e112a729fc4c69692444e4289b/xugodejibeziz.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8951603b7e78f2f5af0aa59991c1130/lekidobodexo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=kenchic+layers+pdfPDF 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_off0000b9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C6 16120 bytes
SHA-256: de7917e79485a058f18138afb8bee07b713b2bc83d7ab14f2ef3b109d7f782f4
font_01_sfnt_off0000e20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 10604 bytes
SHA-256: 52ce94940e5f648d7f1347ced2af027e7e65691250f721de61a6f926f1d3a593
font_02_sfnt_off0000fa2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1