Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd2145b4a0b94fb…

MALICIOUS

PDF

82.0 KB Created: 2021-09-13 12:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 95b6af3e9e693971ee1600ef0049f9dc SHA-1: 55a177c09e85686b70b56c69f3776eefc542d37f SHA-256: 3dd2145b4a0b94fb2c9e4da10202e573841791138a5700ddcb3a6f62a409440b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream, indicating malicious intent to execute code. The presence of numerous external URIs, many pointing to PDF files on potentially disposable domains, suggests a link farm or phishing lure. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification, likely involving phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://livredart.com/ckfinder/userfiles/files/garewinufezovaken.pdf In PDF document text
    • http://shippingengineering.com/files/ckeditorothers/wuxene.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/89136685825.pdfIn PDF document text
    • http://zenkatsu.dk/files/14692238611.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/34429695832.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/65088130745.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/n5o14o9d4ntjujpe70kl4p3ov7/9678135563.pdfIn PDF document text
    • https://datenglagi.com/contents/files/xavexapu.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/lififodin.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/niwalisomosuwaxofisoz.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/birotuditujaxadapiga.pdfIn PDF document text
    • https://v-rshine.com/upload/images/files/7537352766.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/56109389334.pdfIn PDF document text
    • https://hinodecoder.com/userfiles/file/78753024489.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/kivulogodoluxepetosulu.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/metis.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/56172475916.pdfIn PDF document text
    • http://kes.org/upload/editor/files/57378171338.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/3ed6c129873a3054a533ee69bc54b705/zowisitumasure.pdfIn PDF document text
    • http://newkontakt.ru/userfiles/images/file/sewinelezepal.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/75216395496.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/3943943240.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/25192148947.pdfIn PDF document text
    • http://neteyes.eu/editor_up/lavizupo.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/72891865951.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=wonder+woman+online+moviePDF 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_off0000dcf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF8 10288 bytes
SHA-256: 984c438917425c3bf64e950c5a0d6e3b8f2341e522fc5d2fcdda5d967443b8de
font_01_sfnt_off0000f416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF416 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C28 17848 bytes
SHA-256: 7820e6e906c7d37089369494fdce0ddee54b98892405cf83d125fe45fabb5e4f