Malicious PDF — malware analysis report

Static analysis result for SHA-256 41eb51b09562077a…

MALICIOUS

PDF

69.2 KB Created: 2021-01-25 23:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2168c825b03dac543b493d4ba7c9ccdb SHA-1: d86f9f344d14f20035b6588969a12fddc5a7e66a SHA-256: 41eb51b09562077afd1b6847235b69ff71bb706d69b3b211a3e398407b09e4c7
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, including critical detections for a suspicious link lure and a PDF link farm. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('loginwithfb.site') and another to a URL that appears to be part of a link farm ('bologen.ru'). The presence of these links suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://bologen.ru/123?utm_term=calendar+worksheets+grade+3+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495686/normal_5fecb3a274279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_5fdc69207f54b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368745/normal_5fcb6531d9812.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/c6334f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449604/normal_5ff376a391eb8.pdfIn PDF document text
    • https://zewadozodatigi.weebly.com/uploads/1/3/4/3/134337643/nilutamirikal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416490/normal_5fdf74507c3f0.pdfIn PDF document text
    • http://carluxepaint.site/dolibevugavasukoze0wdu.pdfIn PDF document text
    • http://myfavoritesun.xyz/sukadili3qiyc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404503/normal_5fc71a6080727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406516/normal_5fd7cbc56c923.pdfIn PDF document text
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/tibivujejak.pdfIn PDF document text
    • http://loginwithfb.site/mens_haircuts_long_hairhklab.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/jozaponi/3332630164.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/bombay_movie_free_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/mamorutorumi.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/81165008905.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/runalefatibi.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/95457654522.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/data_analytics_and_reporting_manager_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/ganosusezakedifugejo.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_off0000d07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07F 5528 bytes
SHA-256: 0dd8c1825e78fbcdb2e28b20fb824a5bc27dd53d785a34436cbcac05d40f0a96
font_01_sfnt_off0000e35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35B 10492 bytes
SHA-256: 95d4a9f24d76542d663fc4ceeca8ec44253d24eb3dd69e5b3ebaea104ad8f2cd

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