Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac47f1b8feea41f…

MALICIOUS

PDF

38.4 KB Created: 2020-10-23 13:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 010719210e5e9b867da2c177e4a60275 SHA-1: 6a69c5eb1122dc6b46dd56212c0df74dfff50ebd SHA-256: 4ac47f1b8feea41f9be08f10a8ef1df19b0f63668ad8467b640de05c80556de1
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://cctraff.ru/aws?keyword=baku+mutu+alkalinitas+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5f8d4d3915713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f92a0d7a903c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f8c4efd2219c.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/31a916eeb.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/dinemubutelujug.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/530501ee.pdfIn PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/musuki.pdfIn PDF document text
    • https://xumusiroti.weebly.com/uploads/1/3/4/3/134321309/sapifanugosemuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f87a98d37367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f87418819f0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f8be427a57ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f92651a97045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376611/normal_5f8e6b8a89378.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/fatepop-sunusuzom-segolatulowinin-nuteniwu.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/546312.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5373/3790/files/kodanixadidagukeranan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1778/7321/files/apk_data_modern_combat_5_offline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/7261/2262/files/perpendicular_and_angle_bisectors_worksheet_5-2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6510/9397/files/asian_straw_hat_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2490/0515/files/papede.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/jufarupadodiwatuvevem.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/netizens_in_cyberspace_active_citizenship.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/causative_have_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/coarctation_of_aorta.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/sukaduvomi.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_off00005718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5718 5204 bytes
SHA-256: edd433cffa9c02779f13754ed6c1080e3759d4371bd21a61c0cfdfd52499e1b9
font_01_sfnt_off000068bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BF 10864 bytes
SHA-256: d28969c6887e99312ab8abc27910e70769c46178eaadf817f452f682304e694f