Malicious PDF — malware analysis report

Static analysis result for SHA-256 d161d038ce08f30a…

MALICIOUS

PDF

70.7 KB Created: 2021-02-15 20:24:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e05d5f70ec36b6ef696e20b6eb8b0eb2 SHA-1: fd7bc6e91d3d81c076ca70969abbedd88c4b9fe6 SHA-256: d161d038ce08f30ae9fb0fddc22187fd4b6611ed461d42338e3ae30b8816034a
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=acids+and+bases+test+answers PDF link annotation
    • https://kasababafaraw.weebly.com/uploads/1/3/5/3/135336348/8ca3e1ceeb.pdfIn PDF document text
    • https://barobinamad.weebly.com/uploads/1/3/4/7/134756413/5715016.pdfIn PDF document text
    • https://maxijegiv.weebly.com/uploads/1/3/4/1/134131269/3652767.pdfIn PDF document text
    • https://gizomedapirev.weebly.com/uploads/1/3/1/4/131454265/kuronafimobaga-piredolovuxepuw-bepafevibexe-tanumizota.pdfIn PDF document text
    • https://safodejinuvi.weebly.com/uploads/1/3/4/7/134753113/xevimowanuxap.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/4889913.pdfIn PDF document text
    • https://dapazigozasonim.weebly.com/uploads/1/3/4/4/134466252/luvagim_betug.pdfIn PDF document text
    • https://fesifikigit.weebly.com/uploads/1/3/5/3/135319823/9143551.pdfIn PDF document text
    • https://juwalonivegab.weebly.com/uploads/1/3/5/3/135309433/1730103.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/rufiwatamaju.pdfIn PDF document text
    • https://fojozotewimoko.weebly.com/uploads/1/3/5/3/135324817/rametozesiboluz.pdfIn PDF document text
    • https://jaxowukijov.weebly.com/uploads/1/3/0/9/130969500/5908509.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xikisefux.epizy.com/caboolture_private_hospital_admission_form.pdfIn PDF document text
    • http://vovivufevalo.rf.gd/6095467157.pdfIn PDF document text
    • http://zakuvusebaj.epizy.com/dopere.pdfIn PDF document text
    • http://nufejubonuviwo.epizy.com/82262901397.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_off0000d7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A1 5120 bytes
SHA-256: 14fa5720a6c0d2dc062ed3e34a521bd55357ca679b0d2ae95da3ea2b9d8cb7c8
font_01_sfnt_off0000e92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92B 10660 bytes
SHA-256: 557784e0d1a8a2811d7d9d6ab0e75ccc223a0217daabf3603d28e8f42e31a07a

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