Malicious PDF — malware analysis report

Static analysis result for SHA-256 c026724a15719d82…

MALICIOUS

PDF

43.1 KB Created: 2020-10-22 05:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f473cf6bd25723050163d851c3452402 SHA-1: 119b840ecccd57e887b5ad7092a6720aec61a9df SHA-256: c026724a15719d82e0be12a621280d52c4626b4955cfac72247339c8f74a8277
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://gettraff.ru/123?keyword=molecular+geometry+chart+worksheet In PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/9824777.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/sojufoxibej-xibojotok.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/665612.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/buwen_beditogekexoga_vobevupukutef_zenuxuzap.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/wawukujebitit.pdfIn PDF document text
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/zivugewepininaj-mogujugaguluz-tumutegarak.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/gapovowumepekegosiza.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/5761154.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279037.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f8f836e620b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368788/normal_5f8d9fba567e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5f8e15ce4b6a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/68370cf3-bc5e-476f-b3cc-66f284f6cc49/sowuxumogijizizurolege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b826a394-cc7a-47e0-b789-f6ab5d122c3c/rotezudunefegazile.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/sujifolifabiwefeve.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/nukawugovuwiwufuwineweped.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/begatare.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/30295316313.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/lavigagige.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_off00006a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6B 5476 bytes
SHA-256: 9355426088825540b4435f7c101cf137b826397006467f0d1b2a8f6f6f58aeea
font_01_sfnt_off00007d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D06 9948 bytes
SHA-256: 4c272f997924f14ff1787f5341e5d36af2d47018cd0fbc59b23c4a0255f9b5e0

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