Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77e0693c2e8c654…

MALICIOUS

PDF

75.1 KB Created: 2021-06-11 08:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 77e34db16bfee3365a0d3a2589adfc0f SHA-1: dd70bee276639fcb7d9894359f91453f8589c595 SHA-256: c77e0693c2e8c654c7accdec4e3f22b82a84789b6995c4f7d49a9e38fae891aa
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, embedding numerous external URLs, with the primary lure being "Pixel gun hack 2021". The document's structure and embedded links suggest it is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/pbw?utm_term=pixel+gun+hack+2021 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464734/normal_60542e4c7a961.pdfIn PDF document text
    • https://xolejapu.weebly.com/uploads/1/3/4/4/134491856/vogidavexadonuf_wipoxag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418570/normal_5fcdc7fe830bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469136/normal_606e10300fa3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482230/normal_60619ad97e578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454045/normal_5ffbbc7254346.pdfIn PDF document text
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/8037115.pdfIn PDF document text
    • https://dedaruxije.weebly.com/uploads/1/3/4/4/134455514/pugesatedowitip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496204/normal_6018ada0043cf.pdfIn PDF document text
    • https://xezujexowesujol.weebly.com/uploads/1/3/4/5/134502134/564f50a77e7a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379032/normal_60470e4e86a03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450038/normal_60c29cb150670.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477139/normal_60099d50440b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478716/normal_60295c76d7d97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383464/normal_601128a24b34e.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/8fe4311c-36dc-464b-b0f3-28988af0fd64/delta_table_saw_router_extension_wing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca05820-116d-4d72-a6db-a831fb069a13/how_to_draw_a_perspective.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5a87eb-f740-4f62-ab4c-176f1e33bbfb/how_do_i_fix_e25_error_on_my_bosch_dishwasher.pdfIn PDF document text
    • http://zepupifob.pbworks.com/w/file/fetch/144426936/true_devotion_to_mary_with_preparation_for_total_consecration.pdfIn PDF document text
    • http://wiliser.pbworks.com/w/file/fetch/145111377/39602885376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cb50d2-a2d3-41ad-8f4e-3cc18403f9ba/quantos_numeros_tem_no_titulo_de_eleitor.pdfIn PDF document text
    • http://fixiguru.pbworks.com/w/file/fetch/144436398/joxusivititabasatigemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62e577a-509f-4daa-8d19-056ada099fb2/bupukosinijarisogudoradex.pdfIn PDF document text
    • http://xetibubib.pbworks.com/w/file/fetch/144889299/download_apk_street_fighter_2.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_off0000eb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 5248 bytes
SHA-256: 1e69cb5e5bb2bccd130528bb87a8260180b7e14103f9773e84726c31f9e04ff4
font_01_sfnt_off0000fd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD19 10000 bytes
SHA-256: d612557c2673b4e946911cab8cb10cd136fc2dad0988621babcfefde51ec688c