Malicious PDF — malware analysis report

Static analysis result for SHA-256 77475e9d450a8c38…

MALICIOUS

PDF

62.9 KB Created: 2020-10-26 08:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 791c4860eb02facde9b3d4bc0fd5192f SHA-1: c488088068441cb7d92c32b46b7c7bb45de09221 SHA-256: 77475e9d450a8c38db7b0d66db7381f1bfe82722e30b5af910d3f11da8ff9217
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?keyword=mekanisme+metabolisme+karbohidrat+pdf In PDF document text
    • https://vakesefujes.weebly.com/uploads/1/3/0/7/130739027/xilowoxi.pdfIn PDF document text
    • https://bawilawuvibowe.weebly.com/uploads/1/3/4/4/134401702/72ce5a65.pdfIn PDF document text
    • https://kirimanadawa.weebly.com/uploads/1/3/4/3/134383910/d6b40976c7eb.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/pagen-mugudimu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377114/normal_5f951657e375c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410443/normal_5f9447a82ff5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384470/normal_5f8e0d5def8fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393016/normal_5f90413e57d07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5f962af63d0b0.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/7323260.pdfIn PDF document text
    • https://zolezuborejizo.weebly.com/uploads/1/3/4/4/134444688/66108285.pdfIn PDF document text
    • https://gijakumode.weebly.com/uploads/1/3/4/3/134306186/167595.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/e0ff620e2.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/6592166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_5f94daa7995de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5f91e2a9025d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f94fcb4c4a02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_5f93e52c3cab3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f8811524da82.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/2650ed35-f34a-465c-80b2-b27c704f17ab/pojan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97818c43-b278-4f4d-a01c-3258d447838b/luzuzikopusuzejikad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d483290a-f064-42eb-a890-c7d3550044bb/gisotorimizurutufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860c1034-0aa3-4054-8ce1-07cdb111496e/lixawakujuramix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5ac2c3-e5c1-48f1-9223-0189d8939bc0/libro_el_par_biomagnetico_dr_isaac_g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e16070b-b51f-432f-8989-d3f2dc5467aa/44862271157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea0edf23-5396-41c8-bb6f-d48790ed08f6/23853996122.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000bbcf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBBCF 28716 bytes
SHA-256: a53a7e58aa197017991584f619ed53017cbabd3fd832f8c3d68477005a858e2b
font_00_sfnt_off00008395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8395 5488 bytes
SHA-256: e7908dddd84663d63aa3b57a3e9995028d493731677af98431e0f20b29881217
font_01_sfnt_off0000960e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x960E 10928 bytes
SHA-256: 07483fefce3da7adb2b9a6251e12eefad34d83a22ee9eb17d52f93e7d2089b59