Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4eb592b3312e90c…

MALICIOUS

PDF

67.4 KB Created: 2020-12-24 17:03:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 23b0a135d79bd4230c2347ef17be6536 SHA-1: 1be5ce22cd001c11d21696ca2c386c6b33d60716 SHA-256: c4eb592b3312e90cb35329a98aac8503c3464f3a976ad1f8018c4a09e5465eb3
96 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 pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spam operation. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://traffine.ru/strik?utm_term=tik+tok+best+music+ringtone+download+mp3 PDF link annotation
    • https://kekofazejigax.weebly.com/uploads/1/3/4/6/134600595/getenubopir.pdfIn PDF document text
    • https://sesesisemiv.weebly.com/uploads/1/3/4/7/134746737/dcf48326.pdfIn PDF document text
    • https://betivina.weebly.com/uploads/1/3/0/7/130774994/7192946.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/hVfieha/nafirogudu.pdfIn PDF document text
    • https://beluxavin.weebly.com/uploads/1/3/4/5/134507718/nukev.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/862f4.pdfIn PDF document text
    • https://sasugitakog.weebly.com/uploads/1/3/4/6/134651708/jafijazofe-duzajugebemefo-lugel-gewaxedizel.pdfIn PDF document text
    • https://bawebixitowugar.weebly.com/uploads/1/3/4/3/134336924/5008829.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7347ff0f-f7b1-469c-aebf-52e757267f14/he_was_a_skater_boy_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/android_phones_under_10000_4g.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/87709311286.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/pojoxumarezelojoj.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/calendar_2018_vector_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/brahms_clarinet_quintet.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/massachusetts_gaming_commission_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/ear_ringing_omen_in_left_ear.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_off0000ca82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA82 5800 bytes
SHA-256: db291acef085f96245c2be0caa080e747303619619f9d3d603b6603ee8f575d6
font_01_sfnt_off0000de3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3F 10080 bytes
SHA-256: ab9535e117e562d936f25bcf13892bc9d540b0b6ffa12a2d0c496ef0e385973c

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