Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9fe3af294655c9…

MALICIOUS

PDF

69.4 KB Created: 2021-09-28 00:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 035d5c59d1aa1e9344cc8af8d0103a15 SHA-1: 8ab41a2b969bdcba2acb7eb9d5a14efda6b6e0aa SHA-256: eb9fe3af294655c9eaa1d79301f48878a78165153ca342851ca39bcc9d5e4461
176 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 phishing attempt. The document contains a link farm pointing to compromised WordPress upload directories, suggesting it is designed to redirect users to malicious content, likely for downloading further malware. The heuristic 'SE_QR_LURE' indicates the document may instruct users to scan a QR code, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://huntic.ru/uplcv?utm_term=download+qr+code+reader+for+pc PDF link annotation
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615230d2827e7---42204685164.pdfIn PDF document text
    • http://caycanh.vn/images/fck/file/rexomivavaxitesinufazo.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/72882954225.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/32711244840.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/68580100454.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/99428542724.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd05bf375a---21958533234.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ebd72c1b7f---7822014846.pdfIn PDF document text
    • http://vps73.juicy-group.com/editor_upload_image/file/memujipawom.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614964c33a89f---pusone.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140052eee42d---69519206373.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613a16999b363---23569662499.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16137a62e0a3c9---divawaxamapogebedoroxit.pdfIn PDF document text
    • http://forti.in/userfiles/file/34197956320.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sidepixoluxabe.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/vonajozuzefixogavomix.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/4f2f4574cc5ad6ce16f858a0aee63b0f/gakokomonas.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/gusedu.pdfIn PDF document text
    • http://zhuoxinlaw.com/userfiles/file/20210912024935_978848913.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319e688c588---76429120963.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614603bee6bcf---dezez.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_off0000b0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AD 10488 bytes
SHA-256: dbfe3463eec301cfa54d90ca728101b7b6654b6f67ba0ec93652b38c97207bc4
font_01_sfnt_off0000c870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC870 15608 bytes
SHA-256: 682f1ad0a71918dc73378d5f201809c606473944393fa45a4c85b903505596a0
font_02_sfnt_off0000efde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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