Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a4d875ab4df58b4…

MALICIOUS

PDF

55.1 KB Created: 2020-09-30 03:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a0c57ad62837f5546df601c8d9b93e77 SHA-1: b035857f29d0e3eabcd6055cf522ceda1736bc5d SHA-256: 3a4d875ab4df58b495c198670ee2b551e6f47c7def4ab95b9695175b8f073a9c
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://ggtraff.ru/strik?keyword=origem+do+abacaxi+pdf In PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/190494560.pdfIn PDF document text
    • http://fojuke.glintofmischief.com/uploads/1/3/2/6/132696210/b1d908.pdfIn PDF document text
    • http://sezikedo.chloecustomcollections.com/uploads/1/3/1/4/131438418/nuwume.pdfIn PDF document text
    • http://wosoketar.hbcutravelers.com/uploads/1/3/1/4/131483108/kawimefowobaso.pdfIn PDF document text
    • http://files.wilmingtonprintandmail.com/uploads/1/3/1/6/131637057/cd8bc305482.pdfIn PDF document text
    • http://rosiwewab.abs.aero/uploads/1/3/1/1/131164462/9f01793.pdfIn PDF document text
    • http://jitobiza.resbalt.org/uploads/1/3/0/8/130874210/8c1d162.pdfIn PDF document text
    • http://zojanop.dedethford.com/uploads/1/3/1/4/131410399/444bc6cce2.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/7354ab71-cb69-4747-a66e-08d0e26014dc/dibeweminelufuguwor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60279d4-22ae-49b5-a149-5984ab495998/dejupujuvosedisexolonakid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac98b7a-05f7-4dc2-a737-7f32adfe467f/bizudiloxipozula.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_off00008cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB5 5104 bytes
SHA-256: 34930b09b64920fabbb57cbf52e026a176fd371eb60e88f17018ad1e46bee25f
font_01_sfnt_off00009e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E14 10496 bytes
SHA-256: 1454753b51be78874ab882af07a5240b0694743fda13821a8b8effa015b99a6c
font_02_sfnt_off0000c194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC194 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176