Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde704b51723e223…

MALICIOUS

PDF

72.3 KB Created: 2021-10-01 11:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 1916994a0fab1eb87a11ce085b4f5e53 SHA-1: 0654b3238559fbf1dcbba22c0a474197d2c39a28 SHA-256: fde704b51723e223177a77cd4aba8a77ea30cbc33d8fa5663ccb6957bfee513d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains JavaScript actions that are indicative of malicious intent, as flagged by ML classifiers and ClamAV. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host numerous links, likely to redirect users to malicious sites. The embedded JavaScript is likely responsible for executing these redirects, potentially leading to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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 http://hainfelderteich.at/kebimi.pdf In PDF document text
    • http://abwninemile.com/uploads/files/32389944036.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/210907072433863828gmo46y.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/46145635899.pdfIn PDF document text
    • http://stimatacasa.eu/userfiles/files/karidumawowiwuverisazoxap.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/30512630104.pdfIn PDF document text
    • https://ijieet.org/ckfinder/userfiles/files/varezebaga.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/3365795479.pdfIn PDF document text
    • https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/juxujinisesowawawupasema.pdfIn PDF document text
    • https://manenshop.com/upload/files/74361806737.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/63606695799.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16148062a2c4bb---41765935291.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/70752535797.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/18390780081.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/64391989850.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/jijesenalarilanewa.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/39288164707.pdfIn PDF document text
    • http://motopujcovnateplice.cz/userfiles/file/fiwal.pdfIn PDF document text
    • http://xinshifm.com/userfiles/file/kogef.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16140a44de0f06---jitojilugos.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/giburodizorunebiku.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/sefutipogusuxusizim.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/96517262115.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/1242470345.pdfIn PDF document text
    • http://santeh.md/img/files/xudej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=marine+navigation+android+appPDF 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_off0000b735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB735 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4C 10412 bytes
SHA-256: bc46d5d52ecf0b7121a0c6f2cb3dff81a07bfb21871a40fcd9d704522d36646c
font_02_sfnt_off0000e6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C5 17464 bytes
SHA-256: 08bba54d4d8b4b1262a4f4a99a611cda84712ce68301ce54fe41185961b3315c