Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab1a065246a3ce5…

MALICIOUS

PDF

78.0 KB Created: 2020-12-16 22:34:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b5cbfc2ee8eb6c4c4f452d2a120478ed SHA-1: db975b7754d7f0122f2e04d73e74aefec3de01ee SHA-256: 0ab1a065246a3ce5bd18751591e00ce4cd00c477d910f6b7e9abe976efab0bd1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffe.ru/strik?utm_term=island+hopping+apush PDF link annotation
    • https://xomarexisu.weebly.com/uploads/1/3/4/7/134701616/zafovik-xiwadeniniwaxo-ziges.pdfIn PDF document text
    • https://sawinabepetejex.weebly.com/uploads/1/3/4/7/134714359/sedixuk.pdfIn PDF document text
    • https://guzaxogovi.weebly.com/uploads/1/3/4/6/134651677/ef66f3cbcf9511.pdfIn PDF document text
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/tuzuremenesuligaloxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc51ec92bbd74065821dbfd/t/5fcced031e1a4d7de12b4499/1607265539758/transformers_forged_to_fight_apk_download_uptodown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3095ea5b-7704-4e11-ae17-2abfddae42e0/sopovutisemefud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51282e9fc3622d53cd60e/t/5fd6438fdca22152603d8a43/1607877519760/60675242692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f5833f-d112-486b-9d97-3a92cb3f85c6/vaxezeledituxuxemutok.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8dcc6229360ecad579d/t/5fcca8b2cded405bb8d444d9/1607248062213/63224186294.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffc42bda9c57a97b92422/t/5fc1be111972c46e3cdf74c5/1606532626152/funevakugivilogu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d2f2d26ff1194f734ddd/t/5fc21aa23485235c860ec475/1606556323339/43502214805.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd071f8bc8713fe6ff0c78/1606223647850/fofibufamukiwufotox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e58ed7cd-cc53-4e19-8781-1d79a2105427/donde_bajar_partidos_de_futbol_completos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cf44e5c7695ca99b2c1d/t/5fc48b8c173fb5383b351aed/1606716300757/11810562336.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fc486e76457125654cca983/1606715113911/25884852330.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1138816f6d44b07bfcb5c/t/5fc6f924bfb90028be4519a1/1606875430758/96760909356.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_off0000f4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BD 5060 bytes
SHA-256: efced1856e16397211696dcd9a40c82f0f18829b9bfcaa48e98cc0ddb8c00ddf
font_01_sfnt_off000105f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F5 11060 bytes
SHA-256: cf2a1c8d421ecbe0f785fd70b9f817532c15344c4e9a1c6421a4982b33dcb616

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