Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b2bdb4d3fb1b86…

MALICIOUS

PDF

72.1 KB Created: 2021-02-16 01:32:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 092910c2e54ce973a221bd1cc13810d9 SHA-1: 0f46351977f7f58b747621f97e636f6ceceb07cf SHA-256: 98b2bdb4d3fb1b86e1a5a4a8b83de74a39043fbd07a34999052101e65c64c0b3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure itself are indicative of malicious activity, likely leading to a phishing site or a download of further malicious content.

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://crophysi.ru/wix?keyword=bakura+ryou+gif PDF link annotation
    • https://kutufexefe.weebly.com/uploads/1/3/4/6/134695169/2b7687efc2c.pdfIn PDF document text
    • https://fojojaroj.weebly.com/uploads/1/3/1/4/131453509/gipivifani-salajij-masilanuzefad.pdfIn PDF document text
    • https://junalupi.weebly.com/uploads/1/3/4/4/134460459/mukizuner.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373261/normal_5ff982f6b1d57.pdfIn PDF document text
    • https://jojapewabivato.weebly.com/uploads/1/3/1/3/131379205/4d6958f9d7669.pdfIn PDF document text
    • https://lanudoda.weebly.com/uploads/1/3/2/3/132303217/9001059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388815/normal_5fd790f1caa37.pdfIn PDF document text
    • https://nirotobilimob.weebly.com/uploads/1/3/4/4/134484477/nugowolenuki_pajovekojorenuf_duzuguwajejuge_tezorejizavol.pdfIn PDF document text
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/fbfdc586e28e4.pdfIn PDF document text
    • https://xapidusexinixov.weebly.com/uploads/1/3/1/3/131382907/7036000.pdfIn PDF document text
    • https://tajadituzutop.weebly.com/uploads/1/3/1/4/131409135/wosafum.pdfIn PDF document text
    • https://felipivi.weebly.com/uploads/1/3/1/8/131856333/vedanogapex_pozatumodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449012/normal_5fe6ec600be34.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/wupixufekijax/easy_reading_comprehension_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/acapella_free_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/befalugegaxakejozat.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/74300725310.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_off0000ded1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 4940 bytes
SHA-256: 7e94142b7ef97b8da7c9a4acb8af87edb6c86c49a3d9e271a808401e83e5f9ef
font_01_sfnt_off0000efcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCC 10504 bytes
SHA-256: 80893fbc34064afc09f6def5c4752b238ea07860355daf00bc458e5f7588be54

Open this report in the interactive analyzer, or submit your own file for analysis.