Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf20d5f7b79b1123…

MALICIOUS

PDF

82.6 KB Created: 2021-02-10 23:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: da6e7cc15e87d3cc9b40ed30a251ea33 SHA-1: 25480330a69ce14f61c7c750833a3d31f9382177 SHA-256: bf20d5f7b79b11235eef2f5950a22382c4dd52088dcb4fde2c3141a87e87e569
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://jacksth.ru/wb?keyword=hily%20dating%20app%20apk PDF link annotation
    • https://wodaxudufusan.weebly.com/uploads/1/3/0/8/130814186/lidimij.pdfIn PDF document text
    • http://weraka.online/wuxajatosulkyvyg.pdfIn PDF document text
    • http://lupepujalin.iblogger.org/riniwowewebujiwowuraxakaj.pdfIn PDF document text
    • https://fusodozot.weebly.com/uploads/1/3/4/0/134096428/20e157.pdfIn PDF document text
    • https://derovidexaw.weebly.com/uploads/1/3/1/3/131382126/f6abb.pdfIn PDF document text
    • http://koprovk.xyz/gofapikefugedesedutq1zu.pdfIn PDF document text
    • https://puriruwuz.weebly.com/uploads/1/3/5/3/135395363/7670626.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/1b749.pdfIn PDF document text
    • http://fly-drive.online/zagubobamd6532.pdfIn PDF document text
    • https://ligenoleka.weebly.com/uploads/1/3/4/4/134496601/f88b9859306.pdfIn PDF document text
    • https://dezusopivelisuk.weebly.com/uploads/1/3/4/7/134734284/9251431.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/7717731.pdfIn PDF document text
    • https://dikemogegopur.weebly.com/uploads/1/3/1/4/131406608/sakufone_sewudasejedo_kizavatagej.pdfIn PDF document text
    • https://laximazerafa.weebly.com/uploads/1/3/4/2/134235816/gamemujinofojowujib.pdfIn PDF document text
    • https://wobikuneli.weebly.com/uploads/1/3/2/7/132741052/4870845.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/jajoxulabojaso/39649665254.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/pamidagenefogekuteji.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/buildtopia_android_apk.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_off00010494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10494 4980 bytes
SHA-256: e8812744f0a6f25b52a3b34ac107d80ebe926692b4f920e6ab6e66c669051c59
font_01_sfnt_off000115a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A5 11472 bytes
SHA-256: c05f9e74c1a798933db7ed5360f951fa411110d6607c44bcb32b15d7a7f8b513

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