Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e477954aaa4e7df…

MALICIOUS

PDF

81.2 KB Created: 2021-02-25 16:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1d8ccc613b376fa29189ce04865d01bf SHA-1: cf1709ab5f6b9636381734d85d8a1792f7ede393 SHA-256: 5e477954aaa4e7df70400a46d30c7d0d57797b28a4d497562b5959cad58f3339
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 other PDF files hosted on various domains. This behavior is indicative of a link farm or a phishing campaign designed to direct users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

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://druttle.ru/123?utm_term=craftsman+air+compressor+20+gallon+5+hp PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492574/normal_5fe162a9cfedd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458413/normal_5ff71b9e6e0c5.pdfIn PDF document text
    • http://mastericy-chistoty.ru/takosujixagefhzgir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381730/normal_5fc7cdf005df1.pdfIn PDF document text
    • https://gapixupat.weebly.com/uploads/1/3/1/6/131637313/7621749.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465559/normal_5fffbfc942a54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470385/normal_601be94b7fbf3.pdfIn PDF document text
    • https://devomideribura.weebly.com/uploads/1/3/4/4/134401990/1825030.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369911/normal_5fe428cdbfde6.pdfIn PDF document text
    • http://instacopyrightcenter.com/297218955352jir.pdfIn PDF document text
    • http://reduslim-ufficiale.website/sabbath_school_lesson_powerpoint4jfhp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nubuwij.epizy.com/what_does_martin_luthers_95_theses_mean.pdfIn PDF document text
    • http://vefugiw.epizy.com/pasedezijuwubiwibujexojiz.pdfIn PDF document text
    • http://kijijaxozaro.epizy.com/aldiko_book_reader_paid_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_off0000fee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE7 5732 bytes
SHA-256: bc23d149748ae36d12a28e25ba245b62ab71fd824e8c5a13a6d04747da689520
font_01_sfnt_off00011245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11245 11156 bytes
SHA-256: 5e277588e6bd41b43255a0c9a71b19910e5ce2d533e5c7ff0d9ad47c81933544

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