Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be445f371a6d8da…

MALICIOUS

PDF

74.0 KB Created: 2021-09-20 18:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f2f1f8ec33f96f5b3b20347b9b63f9fa SHA-1: 29942498be2337dbac27a1e3301b8491182e98e0 SHA-256: 1be445f371a6d8dae91c649f8dd96baaf69a48384fcea08c6cc51e20dfdd1c15
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The presence of numerous external URIs, many pointing to potentially compromised or disposable domains, suggests an attempt to lure the user to malicious content or download further stages. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135093820bfc---17884719542.pdf In PDF document text
    • http://awfiowv.love-mrt.com/upload/files/medozojevepuruketaposev.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/7000112775.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/77916893940.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/potanabevopufe.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/93085605317.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/toratexivomeviravisewa.pdfIn PDF document text
    • http://cobmedia.hu/include/xijigopipiritetel.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/161310606769ce---56975711289.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/27229908337.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/fesefovonavupozulurupa.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/85524060972.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/36874643769.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/sakivabalunabavubefa.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/14048451274.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/vovamafokubuzibujoloxul.pdfIn PDF document text
    • https://oreopay58.com/ckfinder/userfiles/files/lebisenoreribomiw.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/kujuxemepanumugoxisete.pdfIn PDF document text
    • http://millecolori.it/images/file/kosewakujudinesadulitax.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/rorunogukorujemomoveku.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/92538680292.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/93953405103.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=garage+empire+apkPDF 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_off0000bec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC7 17376 bytes
SHA-256: 7214bf9da8d12d83572558b251fc52ee8ccdea503c8bf9e40760ba10eee3cbd5
font_01_sfnt_off0000ec15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC15 10188 bytes
SHA-256: 53cd371f012934d56e250b38116fc3202769a826a10fda51ffe8b79fceb464ef
font_02_sfnt_off000102eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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