Malicious PDF — malware analysis report

Static analysis result for SHA-256 d521c2eb0d8ac3fa…

MALICIOUS

PDF

68.1 KB Created: 2021-09-29 04:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9dcb012a37c1234922eabaa8462875e0 SHA-1: 8aebb20a40a060e157407cc313d078d697509f6a SHA-256: d521c2eb0d8ac3fa44ec7a1ca6ce00ce08479e74298386771f7ca3f4c8a5ca8c
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged by multiple heuristics as a phishing lure, including an image-only document with an action trigger. The document's structure and the presence of numerous unknown URLs suggest an attempt to redirect the user to malicious content, likely for credential harvesting or malware distribution. The embedded JavaScript is likely responsible for executing the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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://wanfutemple.urwaydesign.com/data/file/userfiles/files/titegobobamaxufa.pdf In PDF document text
    • https://sluganarodu.org/userfiles/files/potawukavap.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/32903007563.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/dokesubad.pdfIn PDF document text
    • https://terracell.info/images/file/zexazum.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f265c8548---46541282809.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/54322061557.pdfIn PDF document text
    • http://apicn.net/upload/files/18089003712.pdfIn PDF document text
    • http://affectif.ro/data/Image/file/lulunulosagemupedaja.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fc9aa439ed---javuko.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/2613514622.pdfIn PDF document text
    • http://steinemann-ag.ru/33059504272.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/kidilesoxu.pdfIn PDF document text
    • https://ikansambel.com/contents/files/8393515202.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/97875070611.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/godulexegu.pdfIn PDF document text
    • http://ornito-silesia.eu/userfiles/file/mefiwasone.pdfIn PDF document text
    • http://nhagiatxanh.com/public/default/ckeditor/files/nelepekesavixakujuzunevoz.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/kaxamezivakudusudigip.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/11727833198.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/96267344297.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/zonita.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109270252396429.pdfIn PDF document text
    • http://sushibelovo.ru/files/kafoja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=free+premium+only+fansPDF 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_off0000ae8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE8C 13976 bytes
SHA-256: d7c1d49510b6c7ce2754d86041754821e3b8673b4eecf5692c1f8d8f12968e04
font_01_sfnt_off0000d0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE911 10612 bytes
SHA-256: b1d5e9eef127cac988ca6163ecb410b9243a0e9826d6a4d8bcfbd0fa31ebd3a9

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