Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fa01df2aa89819…

MALICIOUS

PDF

81.7 KB Created: 2021-06-05 16:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e7bbd6f92ce6d5930099a42a0b24b047 SHA-1: e00738988d3484d2e60daa1415a3c137aed45be7 SHA-256: 05fa01df2aa8981995b0aeea453474e87d6df386ca2efc95487994cf9d40a8ec
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://synerhu.ru/pbw?utm_term=amadeus+peter+shaffer+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494160/normal_5fcea15070c12.pdfIn PDF document text
    • https://xepezexitig.weebly.com/uploads/1/3/0/9/130969834/9862001.pdfIn PDF document text
    • https://peketavapi.weebly.com/uploads/1/3/4/3/134331612/boseladomo.pdfIn PDF document text
    • https://didukomam.weebly.com/uploads/1/3/1/8/131857465/3e944b6155936d8.pdfIn PDF document text
    • https://nofiluwovix.weebly.com/uploads/1/3/0/7/130739726/8a0d32e4e8b8.pdfIn PDF document text
    • https://dodesagetulisuv.weebly.com/uploads/1/3/4/9/134902864/deniralekugilu.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/6225290.pdfIn PDF document text
    • https://ledobosu.weebly.com/uploads/1/3/1/3/131383424/wezomaparote.pdfIn PDF document text
    • https://wagezulixi.weebly.com/uploads/1/3/2/6/132695300/mixujavebe_fewexatejem.pdfIn PDF document text
    • https://gozerivolese.weebly.com/uploads/1/3/4/2/134265833/menajerejol_molejovezak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470678/normal_601efb6570bf7.pdfIn PDF document text
    • https://gegiritofizupog.weebly.com/uploads/1/3/4/6/134644009/6239686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_60b8c94c38545.pdfIn PDF document text
    • https://xosotujusosevo.weebly.com/uploads/1/3/4/3/134377620/4475776240c23b.pdfIn PDF document text
    • https://gebigimudixerez.weebly.com/uploads/1/3/4/3/134374499/9012516.pdfIn PDF document text
    • https://fovezifume.weebly.com/uploads/1/3/0/8/130874198/mewux-lizuvagepi.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/22b11fd5-af47-4378-a99d-2e45dfe06aa5/kirkland_spiral_ham_glaze_packet_instructions.pdfIn PDF document text
    • http://rimikupababo.pbworks.com/f/faxosozetunul.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/11525276101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a17dfd79-a113-4164-bb5f-8a68f8d66c74/xudevewokapofasupazajis.pdfIn PDF document text
    • http://tezalef.pbworks.com/f/download_basara_2_heroes_apk_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad850ed-0eb4-4dc0-b122-824e7301a4cd/moto_g_3rd_generation_mobile_charger.pdfIn PDF document text
    • http://zezupagijene.pbworks.com/f/82320825994.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_off0000f60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60F 5364 bytes
SHA-256: 7def1f83da4dbd8070b131fb4bb2e5f76f5cba3dafb3abfbfe249be6b568d3d1
font_01_sfnt_off0001082a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082A 1936 bytes
SHA-256: 73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190
font_02_sfnt_off0001116d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116D 11644 bytes
SHA-256: bce25fc7e41770ef6ca43e4fd789e57c4b30154cd84d3c20b78760cd83650eca