Malicious PDF — malware analysis report

Static analysis result for SHA-256 57343d823844d4f0…

MALICIOUS

PDF

40.6 KB Created: 2020-11-08 11:21:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f47ddb87be964f7e5b298c2d47f9a13e SHA-1: e06da7792ddddfc9ee95fc709db3a7039116c71b SHA-256: 57343d823844d4f00b66eb154fe414eff4a4cf2030fba997125d738dff5bd921
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/aws?keyword=prudential+life+insurance+company PDF link annotation
    • https://ronisimene.weebly.com/uploads/1/3/4/6/134610282/6113509.pdfIn PDF document text
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/zewokuwupijosatijiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414360/normal_5fa6cfadc56ca.pdfIn PDF document text
    • https://dopikilazobowu.weebly.com/uploads/1/3/4/4/134488506/fugev.pdfIn PDF document text
    • https://xotukejurivaj.weebly.com/uploads/1/3/4/0/134016857/gunesume_fidit_kuwepokanurufo_zarose.pdfIn PDF document text
    • https://pafazemewo.weebly.com/uploads/1/3/4/5/134517711/7730024.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8b660ba8-05a7-4712-a89a-392c42d92770/10199409409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb76c3a0-0ba2-4acd-96c4-92c47244022d/zowekuluribosetula.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/94608977269.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/29234904835.pdfIn PDF document text
    • https://wabewope.files.wordpress.com/2020/11/motojedorogab.pdfIn PDF document text
    • https://lawetujez.files.wordpress.com/2020/11/edge_491_recumbent_bike_parts.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_off0000518b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x518B 5284 bytes
SHA-256: c5824e774cdcfe2ee8ac6f76ea0e9ecb9bd21b930033394826a31b1872369286
font_01_sfnt_off0000636a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 10564 bytes
SHA-256: 0aa2a99f5500085678726889d8dd1e1996ee8f7872220ba5b793fe3d72868b74
font_02_sfnt_off00008796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8796 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378