Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f54029f946cd00…

MALICIOUS

PDF

85.4 KB Created: 2021-09-01 12:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 98e008b610e91f87308d0b10b9c674cd SHA-1: 634fc4126a067b354fe6720c73e5154bd74fc845 SHA-256: e0f54029f946cd00e57e5eede60c0e0116c262678904e947cb6cceacca5d3f16
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, many hosted on compromised CMS platforms or disposable domains, suggests it functions as a lure. The primary goal appears to be directing users to potentially malicious websites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://inwebjor.ru/uplcv?utm_term=meaning+of+ged+in+education PDF link annotation
    • https://ijmscr.com/ckfinder/userfiles/files/kujuravinakokijive.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107b6b064994---85992604057.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/tirubin.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/miset.pdfIn PDF document text
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/91770075980.pdfIn PDF document text
    • https://cmetrix.net/ckfinder/userfiles/files/38153550358.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093e6648afa8---lavukuwexoxewunekepuromu.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/64480431940.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202108241816014815.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bc02049c27---kekaxapo.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/a1c56f4oj99urvt1renco7j2ru/dososagufeteruwavogovip.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/sowerofixikodovorajukiw.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/76429705763.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/tebajalegopuwixomeladafe.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/5b1l228ntpbm3b8bsai6k91ji6/suzutepusinu.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a866de6908a---dazus.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cabc34daaa---kaxapusorimopimuxeduw.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/garufavi.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf74f61d15---77227063507.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/98526026594.pdfIn PDF document text
    • http://ck-buhgalter.ru/userfiles/file/61755028788.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-6-25/20210625220844743064.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_off0000e7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FE 10432 bytes
SHA-256: aab4d8565349279d342c60579b5c5d39495cd44250b4be847022f1bea3611c2d
font_01_sfnt_off0000ff8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A1 18012 bytes
SHA-256: b36e8becb98631ef5a3a773e7d21308251772c61a44d883a3516ffe8ff5cc9a1

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