Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4620544f25c143…

MALICIOUS

PDF

151.3 KB Created: 2021-03-18 21:39:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 077055c046e52c171db5ccf976172477 SHA-1: 29f2692c7f950fd8d9a52528e4ebf921e4c5fe48 SHA-256: 5a4620544f25c14381707632a74cdf94603833b5685a2c8ab201fd08c1cc743f
136 Risk Score

Malware Insights

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

The PDF document contains a high-confidence heuristic indicating it's a phishing lure, specifically using an SEO redirector to disguise a free download. The embedded URL, https://vilenefex.ru/wix?keyword=nexgrill+product+manual, is the primary indicator of this malicious redirection. While no scripts were explicitly extracted, the nature of the PDF and the redirector strongly suggest a phishing attempt to compromise users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • 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 lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://vilenefex.ru/wix?keyword=nexgrill+product+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459784/normal_60117a2ec50bf.pdfIn PDF document text
    • http://pinezotamex.getenjoyment.net/janovugazimenazafuvesiw.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/dafudaliw.pdfIn PDF document text
    • http://bukuminuwakub.mypressonline.com/annotate_free_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/hdheigv/64444898052.pdfIn PDF document text
    • http://mibotirekusiw.mywebcommunity.org/great_are_you_lord_guitar_chords.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/wills_eye_philadelphia_broad_st.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_5fe70728de373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496607/normal_6046c17c64a84.pdfIn PDF document text
    • https://cdn.sqhk.co/kapipota/ajjnvxx/4360200175.pdfIn PDF document text
    • https://cdn.sqhk.co/rutuliduzo/geeythf/multiple_cavernous_malformations_icd_10.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/lalaz.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/ambareesha_kannada_film_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/seiko_solar_chronograph_100m_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/kapagoxonevevofolivo.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/69360021016.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/accounts_payable_income_statement_or_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/62073828822.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/kujuxejirevipijilo.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/zofabemununijadivujev.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/93166125610.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000206b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x206B8 1992 bytes
SHA-256: 2a26bdf45b3fb8f7e15df1256197a30dfc943875462e4bf18842f307a39fdb8a
font_01_sfnt_off00021029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21029 5252 bytes
SHA-256: f8f7cbac61e743ad44da66f661f3b9c9d9dd19c4182c630e186fd77d397075b0
font_02_sfnt_off000221fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x221FC 13872 bytes
SHA-256: 18ad7cc9539868c0aa98b699ed8d0e8b301824c6a32bf252e38483a3cc1d5937