Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ce47f37c7ebd5c…

MALICIOUS

PDF

91.6 KB Created: 2021-03-28 02:09:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: aabc14e9dd96232330f2bc477ba02d4f SHA-1: 065fcf02001826bc13ffedefb821a2bd96e235c3 SHA-256: d5ce47f37c7ebd5c8812286d17187f191f357b70391a9c40c5d6392a47136c07
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, indicated by the presence of a large number of external links hosted on disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary goal appears to be directing users to download potentially harmful content through a link farm, which is a common tactic for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=blues+electric+guitar+lessons+for+beginners PDF link annotation
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/bopufivojarupi_razileb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413361/normal_6054b391ee5b8.pdfIn PDF document text
    • http://kuziluzesoga.22web.org/7835144595.pdfIn PDF document text
    • http://talkme-news.info/99382174733rrnef.pdfIn PDF document text
    • http://wgathering.org/88393854759iovj4.pdfIn PDF document text
    • http://soxexuv.iblogger.org/78019429879.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/jjgcjiX/bluestacks_hd_app_player.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426277/normal_5ffef94a1e002.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382187/normal_5ff9791368df2.pdfIn PDF document text
    • http://redpandarecycling.com/68388622837iwbqf.pdfIn PDF document text
    • https://jugafuxuxeg.weebly.com/uploads/1/3/2/7/132740719/radatudek.pdfIn PDF document text
    • https://vevikonupefafo.weebly.com/uploads/1/3/5/3/135391347/govogupuveti_zowixozeroso_vavepujul.pdfIn PDF document text
    • http://roxopazin.iblogger.org/toyota_verso_service_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/jdhfhgf/wezutikixisifirafadumepas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403681/normal_5fc843928dbeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b68cbea-39d7-4b8a-a1dc-665d2d29c4ad/how_long_to_remove_wart_with_salicylic_acid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9044fd8-c48e-441e-ba2f-e7b8f1454b43/advanced_excel_reporting_for_management_accountants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891dcba5-2f97-428e-a75a-1bfd7a3b12c8/vifolonobunodiruviw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d06545dd-56a7-454a-be1f-6204480a000f/69457568926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d2a2c9b-9ca4-4c0c-8ce3-94cad915a2e5/how_to_use_peavey_sanpera_1.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10867 5240 bytes
SHA-256: 6923e15a6045709da154cdfe5d83ebe29d6a99849b5520502f2a95253c0090a3
font_01_sfnt_off00011a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A48 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000122d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D6 11328 bytes
SHA-256: ead53b320b83a1759f90f8c052f32b2d4ae86ad785f970edb82e475f086867a9
font_03_sfnt_off00014965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14965 16140 bytes
SHA-256: 2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3

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