Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd43dfb0611fdda1…

MALICIOUS

PDF

65.2 KB Created: 2021-02-26 12:30:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7a24f9ea023b36e1c69f9468a62cf639 SHA-1: 5ea6694b47cb4179fc2f59755e5039f055dba2ca SHA-256: cd43dfb0611fdda134181ad237b3ea7b0fdae95872dc52692bd1c1ac090acec2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/award?keyword=ryobi+airstrike+stapler+won%2527t+fire PDF link annotation
    • https://dojixevagix.weebly.com/uploads/1/3/2/6/132682303/1540568.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/736cc44c7b53.pdfIn PDF document text
    • https://samabuwe.weebly.com/uploads/1/3/0/7/130739499/pixagigekajorof.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/sqihaja/zawesusabomanabixupa.pdfIn PDF document text
    • https://bazuxenulasiv.weebly.com/uploads/1/3/0/7/130740357/pefuvisu.pdfIn PDF document text
    • http://nuguzofa.iblogger.org/68091510995.pdfIn PDF document text
    • https://babuzusevajuwo.weebly.com/uploads/1/3/4/8/134878483/rujuzunidoxumamo.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/dozatezisiveretodal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://komivarutu.epizy.com/leridukevuj.pdfIn PDF document text
    • http://xuneviwek.epizy.com/is_there_going_to_be_warcraft_2.pdfIn PDF document text
    • http://luzigipo.epizy.com/adobe_cs_suite.pdfIn PDF document text
    • http://jifadeve.rf.gd/97810623132.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_off0000c283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC283 5332 bytes
SHA-256: 0152e101ac85d99a81624e5700e86da6da2259b12a7188f34d8bc673597e5a89
font_01_sfnt_off0000d4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DF 10400 bytes
SHA-256: c9a589c10788a3bbb19caf78e00ee82332811632907eaee84475bc4e6ff86090