Malicious PDF — malware analysis report

Static analysis result for SHA-256 934373a6e55e2efd…

MALICIOUS

PDF

71.4 KB Created: 2021-09-25 11:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 64e3e2853f2fa0cf5c7a9294cee6f5d4 SHA-1: b2ac96bf44512a520014208dda4548f464e333fe SHA-256: 934373a6e55e2efd2c3f95846f5e1a0a5a229d972a986de9b792b84280540b2b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which are hosted on disposable domains, indicating a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • 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.
  • 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://crysiq.ru/uplcv?utm_term=watch+rupaul%27s+drag+race+uk+season+2+free+online PDF link annotation
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/pabefokagetibirizijus.pdfIn PDF document text
    • http://halongwave.com/userfiles/file/bariganujerasop.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/53229754454.pdfIn PDF document text
    • https://derya.afmiletisimajansi.info/resimler/files/71709201229.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/xowemudawiniwoxibipo.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/tgdb4pcvvdcb48oqc12dhf7t0k/50227276285.pdfIn PDF document text
    • http://newgoodluckcrane.com/admin/uploadfiles/file/giroroniruvujos.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/xuvimobevugalatotato.pdfIn PDF document text
    • http://wideanglepackaging.com/ckfinder/userfiles/files/likurikunimufoxiwi.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/57653805894.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/12579227205.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/davuxiwuduzitolopizeno.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/31024812024.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/wekeweruwux.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/vomulosegisoguvovegofeb.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/voripasifivuvagijewalex.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/fogozusetufipag.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/95654878696.pdfIn PDF document text
    • https://badrivishal.com/media/nevadas.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/vojeleguwuva.pdfIn PDF document text
    • http://lg-palette.com/upload/files/pinotalepefalowafubewa.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/52f989a0a1169bccba8afebf087873f9/muxejiziduwefitunovat.pdfIn PDF document text
    • https://at-studio.tw/app/webroot/userfiles/files/20210904_233253.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210907134717.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/musopige.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/romojuxatimazariwuzef.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://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_off0000b5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C2 15588 bytes
SHA-256: 9d835146f2bd1afab3680e818c74943171bd58244f3a154973cb1ea14a6a50d3
font_01_sfnt_off0000dd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD08 11240 bytes
SHA-256: e3575fb146c0b4151afc883298e30cc24dd59adf2da10e887d7e0c7601dfe1d2
font_02_sfnt_off0000f745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF745 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1