Malicious PDF — malware analysis report

Static analysis result for SHA-256 1deec58d7a494081…

MALICIOUS

PDF

77.7 KB Created: 2021-05-21 20:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a536fcde39b87bd53b8713294c00e560 SHA-1: de65eed5b1b256602a93bb0953ec50ac9ae23b4e SHA-256: 1deec58d7a49408159d155fd4e31f437aa92104f1c071413c0a2b858f54ab42d
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://lozipotod.ru/strik?utm_term=palabras+para+padrinos+de+brindis+de+xv+a%25C3%25B1os PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417226/normal_600ba3d16c1d5.pdfIn PDF document text
    • https://zugowexilib.weebly.com/uploads/1/3/5/3/135349829/181f1557f.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/ronuvud.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/rudelikuxorosol.pdfIn PDF document text
    • https://mojogobiwed.weebly.com/uploads/1/3/4/7/134747953/1842916.pdfIn PDF document text
    • https://tozuxixawijere.weebly.com/uploads/1/3/4/5/134523333/225f369a0b0a4e.pdfIn PDF document text
    • https://pavimukafimedab.weebly.com/uploads/1/3/1/4/131483282/7029605.pdfIn PDF document text
    • https://jurozujuzofu.weebly.com/uploads/1/3/4/8/134875655/tumolila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_60532c8748693.pdfIn PDF document text
    • https://jobipidamefoji.weebly.com/uploads/1/3/4/6/134696246/70b1cbe0ec5e002.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/2ee4ec.pdfIn PDF document text
    • https://retibome.weebly.com/uploads/1/3/4/6/134680472/zolalazudat.pdfIn PDF document text
    • https://bidubemawekewar.weebly.com/uploads/1/3/0/8/130815124/jitagavuj.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/votawawo/21654376432.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/blood_bowl_roster.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/93348809777.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/11016658827.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/linear_inequalities_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/do_silicone_watch_bands_last.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_off0000eea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA4 5436 bytes
SHA-256: 35fb9f5516d84e861c2fdb9aebc1ae8ca3c849640cfc3d8e54bba7de99121f00
font_01_sfnt_off000100e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E6 11900 bytes
SHA-256: c92df7c8e61736576193f188323b0214991d012a7bf82824b399ad89845e6a28

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