Malicious PDF — malware analysis report

Static analysis result for SHA-256 42755125424f7c97…

MALICIOUS

PDF

69.8 KB Created: 2021-01-19 16:05:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e1795fc1afe8995fee79e553520411a2 SHA-1: 3fc373c4d9e15357430436b7a3882da4e6ff43a0 SHA-256: 42755125424f7c974943dba025181d4debf20581964bbeb3536631c554c526b3
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://leonvi.ru/wb?keyword=school%20bus%20demolition%20derby%20mod%20apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419630/normal_5fad718e42565.pdfIn PDF document text
    • https://junurewumopu.weebly.com/uploads/1/3/2/7/132740614/rivamaf.pdfIn PDF document text
    • https://mikugixu.weebly.com/uploads/1/3/1/4/131438693/jepaju-powitejiwe.pdfIn PDF document text
    • https://rupasofo.weebly.com/uploads/1/3/4/8/134892789/3035442.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474450/normal_5feb1d9f5afca.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/gfjhGqk/46800859609.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/hePjfhh/52782347296.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/fjaJXdz/norse_god_names_for_female_dogs.pdfIn PDF document text
    • https://fetarulezi.weebly.com/uploads/1/3/4/4/134487317/zusir.pdfIn PDF document text
    • https://site-1177836.mozfiles.com/files/1177836/killer_bean_unleashed.pdfIn PDF document text
    • https://cdn.sqhk.co/noxobabidof/iiwvgie/mary_washington_field_hockey_coach.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5fb96ab3a7aad.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/nerugiraxura/pixewumup.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/46996615891.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/lefebelufagexelo.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_off0000c766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC766 5724 bytes
SHA-256: 72b7988db4e6e7be476444c02b95233f66b0b86186aacbee199528e42b2559e8
font_01_sfnt_off0000daaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAF 14780 bytes
SHA-256: 213c076ff319ec1b877eee87ce6a05540af89426815eb0a471c4189039a38e11