Malicious PDF — malware analysis report

Static analysis result for SHA-256 821fcb2e180132b1…

MALICIOUS

PDF

36.4 KB Created: 2020-10-05 01:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 08342461b2ecaff0bdc4c6df657d6c79 SHA-1: f8ffcff73e7a5ab20ba8c13ca868dbeefd39ad5e SHA-256: 821fcb2e180132b1801bc19a441c097d87f67e9b59c7abba476454736114529a
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/strik?keyword=cuento+infantil+no+te+rias+pepe In PDF document text
    • http://buvanofu.stirene.org/uploads/1/3/0/7/130738943/rokatexo-welabojijege-bopodas.pdfIn PDF document text
    • http://medove.bhlexvolunteers.com/uploads/1/3/1/4/131482995/pabodevaturukurukod.pdfIn PDF document text
    • http://zilatono.nicholasperryclark.com/uploads/1/3/0/8/130874284/jejik_xawebizewemudig_gibetite_xuxototomu.pdfIn PDF document text
    • https://site-1037837.mozfiles.com/files/1037837/tivorunutogo.pdfIn PDF document text
    • https://site-1036722.mozfiles.com/files/1036722/xikogikalaxijelizenid.pdfIn PDF document text
    • https://site-1043691.mozfiles.com/files/1043691/97657127744.pdfIn PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/94207283923.pdfIn PDF document text
    • https://site-1042677.mozfiles.com/files/1042677/mamuboti.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/37f77a8c-bc3f-4b08-9ff7-bb2b37bad3e0/59371654754.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_off000041f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41F3 4800 bytes
SHA-256: 9d8fbe423036fb14755fd1a17dc27d0cfa0d541b55e245dcd4d561d5c79866f0
font_01_sfnt_off00005252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5252 10872 bytes
SHA-256: 0df86663f5a570a3f825e786d85289974eaefe46387a690e438d99599213a5ac
font_02_sfnt_off000075d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378