Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38044b89fafa672…

MALICIOUS

PDF

67.2 KB Created: 2021-03-19 19:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a5b5361b270758a0e51b5f3faa78ae6 SHA-1: 1a1cd118e5f9bcecc9e8401978f55d29d13f8ec8 SHA-256: d38044b89fafa672df860cd70b5b121623662d984780ace5a0bb6e9eaf973f70
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The primary malicious URL identified is 'https://resalured.ru/strik?utm_term=best+money+market+to+invest+in+kenya', which is likely used to redirect users to a phishing or malware-hosting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=best+money+market+to+invest+in+kenya
    • https://xuvifadeto.weebly.com/uploads/1/3/2/6/132682806/ffa657debd4.pdf
    • https://nuxutesinof.weebly.com/uploads/1/3/1/4/131437012/9728535.pdf
    • http://narexatefaz.22web.org/62024830031.pdf
    • https://zewugijisisu.weebly.com/uploads/1/3/4/8/134885238/detikaxifab.pdf
    • http://zovizakuxefo.iblogger.org/langrisser_mobile_ice_dragon_guide.pdf
    • http://xivixevikid.iblogger.org/tamil_nadu_2016_election_results.pdf
    • http://demaxapap.22web.org/astro_a20_ps5_adapter.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xibunagevidaze.rf.gd/95634571277.pdf
    • https://s3.amazonaws.com/vetamedisoz/28428587535.pdf
    • https://s3.amazonaws.com/bededuxotulapil/zuxunile.pdf
    • http://tikimolanevi.rf.gd/break_even_point_free_download.pdf
    • https://s3.amazonaws.com/mujesogi/engagement_invitation_video_template_free.pdf
    • http://kaluzoxot.epizy.com/watusi_ios_11.pdf
    • http://tosogaxaf.rf.gd/42576015985.pdf
    • http://bofogaf.rf.gd/bartok_mikrokosmos_vol_3.pdf
    • http://wekujugom.epizy.com/90380168733.pdf
    • http://lokakowevokeb.epizy.com/alimentos_con_alto_contenido_de_magnesio.pdf
    • https://s3.amazonaws.com/tobito/pocket_oxford_english_dictionary.pdf
    • https://s3.amazonaws.com/xamibebulosaxug/fatop.pdf
    • https://s3.amazonaws.com/nuxulikiwab/65413465052.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce00.bin
61bf2ad43a884c47684ce756a9a48be699a17ecf0fc4391d147e2ecadd7d0e95
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE00 5072 bytes
font_01_sfnt_off0000df39.bin
6a88d0e6f3a7d95a268bf6d614473bc69b2ee3aca906fe4e1aa0edb3afc5562f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF39 9544 bytes