Malicious PDF — malware analysis report

Static analysis result for SHA-256 b463bfce414f0205…

MALICIOUS

PDF

61.8 KB Created: 2021-02-16 12:49:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ac5ed2423c4fac99b12c20ee4eb27972 SHA-1: 5a9236736a05f7b5403a0aab05925f9eda721712 SHA-256: b463bfce414f02053b8b391c8797c34b0d5ee8772320e2525e97b8023e9c8c9f
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wb?keyword=asus%20m5a78l-m%20lx%20plus%20manual PDF link annotation
    • https://jetosopotow.weebly.com/uploads/1/3/4/0/134018613/9390247.pdfIn PDF document text
    • https://gafewifem.weebly.com/uploads/1/3/1/3/131379815/fuwadirujebo-midemu.pdfIn PDF document text
    • http://pemeturaw.iblogger.org/27504177104.pdfIn PDF document text
    • https://nigizamizu.weebly.com/uploads/1/3/4/3/134319440/d5b19368d.pdfIn PDF document text
    • https://woziwapimarezex.weebly.com/uploads/1/3/5/4/135400795/zezewepil.pdfIn PDF document text
    • https://vevumugenewasu.weebly.com/uploads/1/3/0/7/130776279/nogebuliva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457000/normal_5fcc2c4e2c079.pdfIn PDF document text
    • https://xikoroto.weebly.com/uploads/1/3/4/3/134338579/1d5998.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370767/normal_5fca485394c10.pdfIn PDF document text
    • https://furivupes.weebly.com/uploads/1/3/5/2/135295821/4678646.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mokixetat/information_technology_advancements_in_healthcare.pdfIn PDF document text
    • http://gomupinoteripa.epizy.com/74363157015.pdfIn PDF document text
    • http://lukigek.rf.gd/penjumlahan_bilangan_biner.pdfIn PDF document text
    • http://tinozireru.epizy.com/acer_x112_projector_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/kesox.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_off0000b540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB540 5356 bytes
SHA-256: aeec3e436b837f92678feda58e6a70ddcaac75a90f34fe0fdb44078a0b372ce4
font_01_sfnt_off0000c77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77E 10276 bytes
SHA-256: e3b5ab72acda02dd7f81a6e5474a15e11cbb103c23f1c0f1279995c8058de20f