Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2068f099c27ca5…

MALICIOUS

PDF

83.2 KB Created: 2021-03-14 05:05:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1cb0a22a60fcb9dc25259ce196ca20e8 SHA-1: ad20d1c6ac557e42e272baf82fc57acd06464cd8 SHA-256: ae2068f099c27ca5bd73b93e30e7250451d71fc485e7e844607b6e7a840bb2ed
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The primary malicious URL identified is https://midufefew.ru/wix?keyword=gold+mining+setup, which likely serves as a lure or a gateway to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wix?keyword=gold+mining+setup PDF link annotation
    • https://busekedogipu.weebly.com/uploads/1/3/1/4/131454033/34930ec720.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/hbjhSji/angular_6_form_control_name.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476272/normal_5fd315a9de5de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487927/normal_604d154e6f8c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408476/normal_6013318b24d1b.pdfIn PDF document text
    • https://cdn.sqhk.co/ramowejub/gfhgkic/ant_radio_service_android_para_que_sirve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453335/normal_5ff9a834efb71.pdfIn PDF document text
    • http://siwupezomejen.getenjoyment.net/sap_inbound_shipment_table.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495055/normal_602b85456bddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451766/normal_5fdc5b612ddf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_602cb3810a344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415534/normal_5ff419905cb4f.pdfIn PDF document text
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/guwikilasibul.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/040800e2-fc7f-488d-ae8a-28dae6a3d078/hoover_windtunnel_air_steerable_pet_bagless_upright_vacuum_cleaner_uh72405pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf44fe5a-6d32-4abe-86a3-a945283d0296/92544691254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/272228e7-7fd6-4759-b081-66fd90b5bf5a/besakasadetimebubevotewew.pdfIn PDF document text
    • http://kugukokoner.myartsonline.com/upsc_agriculture_mains_syllabus.pdfIn PDF document text
    • http://womawujun.atwebpages.com/deadpool_comic_book_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27bdbbbd-733e-49f0-8874-0b7b455fc0ac/30095401043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa280e6-c969-45e7-92d1-9f1aa0cbf993/types_of_textile_fibres_fight_list.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001070b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070B 5004 bytes
SHA-256: e8d9a3afc03bb894e10360387c44856452cdab2700186cf27e1ceb0f5e8b85f2
font_01_sfnt_off00011808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11808 11784 bytes
SHA-256: 94308a64cac6dd5c25891a2e0f2c53ffa6887533534143889403efa80e9146b8