Malicious PDF — malware analysis report

Static analysis result for SHA-256 36125449c5fdb315…

MALICIOUS

PDF

77.8 KB Created: 2021-03-09 08:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9e2357b39ab7fa0bdb29e88736723743 SHA-1: 359c39950dc8765a11cff5609061ebefb85763c3 SHA-256: 36125449c5fdb315f95821a7c8b604f7ad87023b7580ca49145fa54d014dbd0f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://mezovuduw.ru/wix?keyword=toca+life+vacation+apk+award PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417824/normal_6019f33d37087.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_602c05cf045b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_602e10972fe07.pdfIn PDF document text
    • https://vuvoxuwamulixa.weebly.com/uploads/1/3/0/7/130739220/0b3818ead63c392.pdfIn PDF document text
    • https://mofugitapab.weebly.com/uploads/1/3/4/7/134728490/pigatufanujaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473322/normal_5fde68114381d.pdfIn PDF document text
    • https://kukevukoleguko.weebly.com/uploads/1/3/4/2/134265740/a31669871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471083/normal_6009cc4967b84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420902/normal_5fd29389be32a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391024/normal_5fd36dd4ad59e.pdfIn PDF document text
    • https://zojobowexiwe.weebly.com/uploads/1/3/1/3/131380894/pezaruw-firab-jufekegasisofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449014/normal_5fdbd280c5668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_601d5159a4982.pdfIn PDF document text
    • https://jojiwunu.weebly.com/uploads/1/3/5/3/135387754/2206308.pdfIn PDF document text
    • http://kufemotobenin.66ghz.com/lagu_agnes_monica_sedih.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/alchimistul_carte_audio.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_373f3c93099f44cda2e494cb377345de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/what_is_the_importance_of_management_in_business_organization.pdfIn PDF document text
    • http://kutukisorato.rf.gd/canon_pixma_mp160_printer_scanner_driver_free_download.pdfIn PDF document text
    • http://kugesiv.epizy.com/python_for_data_science_beginners.pdfIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_487a4f21a73c46c0a5fb78e1b48b19b0.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 5136 bytes
SHA-256: fb1f978630bb35f18033584191dd66eb979f1e59d38e88fa8ce9253cd4f412dd
font_01_sfnt_off0001063d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063D 10504 bytes
SHA-256: 7ce825ce3d340ed57c4dbafad53e94b7d92e748636e8f9a707ef8231a115aa17