Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e4322a3e54630b…

MALICIOUS

PDF

70.5 KB Created: 2021-02-22 02:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: abf300e8757bbf8b43598a7c2118cbff SHA-1: 24081377faf190ac3f839d4691d7bc9650904f01 SHA-256: f7e4322a3e54630b559d23950e5fa6b7a741b3676052c6cceb5863249fe9379c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The document body, though heavily obfuscated, suggests a lure related to a glucose meter manual. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to potentially harmful websites.

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/wb?keyword=easy%20touch%20glucose%20meter%20manual PDF link annotation
    • https://guvikaki.weebly.com/uploads/1/3/4/5/134519546/8e0e2d.pdfIn PDF document text
    • https://bododomeliba.weebly.com/uploads/1/3/1/4/131408614/1714304.pdfIn PDF document text
    • https://kigilejujagenit.weebly.com/uploads/1/3/1/4/131438309/kolaza.pdfIn PDF document text
    • https://tifalexax.weebly.com/uploads/1/3/4/4/134471923/1331256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_6009e4d00cde3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455207/normal_6007b5ea6ca53.pdfIn PDF document text
    • https://lizuxafemow.weebly.com/uploads/1/3/0/7/130776517/7296484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459029/normal_6031495b4cf3e.pdfIn PDF document text
    • https://falaxejuwutop.weebly.com/uploads/1/3/2/6/132681153/5677148.pdfIn PDF document text
    • http://lanufutado.22web.org/ramozumagajinisopajiwap.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/bejexe/katalon_html_report_jenkins.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/50318556843.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/teledimubaselomajid.pdfIn PDF document text
    • http://girakes.rf.gd/fingerprint_access_control_system_software.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/29295703097.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/siteduraf.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/nojubirorupoxuto.pdfIn PDF document text
    • http://fuxufotab.epizy.com/tosinisozoxeboxusu.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_off0000d7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C3 5272 bytes
SHA-256: 27eda7fb9e7dc9cab93c3a9390630a7131ae59c7767ca52192cb68d6fd5206d6
font_01_sfnt_off0000e990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE990 10284 bytes
SHA-256: 6c06ef3a18ed74be9201ff5e7b677059f6f33fb29f2c072916c407a3ff6a786d

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