Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7378188c19e53f…

MALICIOUS

PDF

68.9 KB Created: 2021-02-19 21:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7c0e122ac9b25bc7154c19a753971c9f SHA-1: d9c109018e51cb347f147ba3ebf0cf697a1bd646 SHA-256: 3f7378188c19e53fa30b319ea939bb06a14d89415eef99a520b642c1e3a05726
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://jottigo.ru/123?utm_term=five+dysfunctions+of+a+team+assessment+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412391/normal_5ff901b8d42ee.pdfIn PDF document text
    • https://rorumelet.weebly.com/uploads/1/3/5/9/135969221/jaraxe.pdfIn PDF document text
    • http://xukewatamom.22web.org/information_technology_business_solutions_corporation.pdfIn PDF document text
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/9475759.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420244/normal_600819b452947.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503874/normal_5fc78cdae2417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457577/normal_6011bd2dc34e0.pdfIn PDF document text
    • https://kisinamaku.weebly.com/uploads/1/3/0/8/130814290/tavololagok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368763/normal_6000bb236700c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vulaxojanomu.rf.gd/benham_palmistry.pdfIn PDF document text
    • http://fimaxopazeviv.rf.gd/blog_tecnologia_e_informatica_2018.pdfIn PDF document text
    • http://nuvafakidem.rf.gd/free_kindergarten_worksheets_color_by_number.pdfIn PDF document text
    • http://luwegovufa.epizy.com/geometric_shapes_worksheets_for_1st_grade.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_off0000cde6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE6 5288 bytes
SHA-256: af3965a4f45e0a00018dfa9f53ef989c706b1b6108579288cb037bb92da0c644
font_01_sfnt_off0000dff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF1 10740 bytes
SHA-256: 0b757f498e2f783dace2430bdb7b5ab142b9818fb757a17dd40d5785b7c03ff5

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