Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b7e9712d4ce673…

MALICIOUS

PDF

71.6 KB Created: 2021-06-01 03:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b33050d5de6217a384eab3b7fe9a9ff7 SHA-1: 1a12bceff236b9762f8eedcd6fdede193fb03b2f SHA-256: 15b7e9712d4ce673d10abb34440990a8d538877e38cb59397d0738d9c4f48b8e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, and the document body references 'Paypal hack apk 2020 no root'. This strongly suggests a phishing or scam attempt. The ClamAV detection and ML classifier further support its malicious nature, likely as a downloader or redirector for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/pbw?utm_term=paypal+hack+apk+2020+no+root
    • https://cdn-cms.f-static.net/uploads/4452148/normal_606a5512b73cf.pdf
    • https://xegejigavo.weebly.com/uploads/1/3/4/8/134883842/zorew.pdf
    • https://gakutuzopekok.weebly.com/uploads/1/3/4/6/134605442/9183351.pdf
    • https://tusukufuduma.weebly.com/uploads/1/3/4/4/134458322/332218.pdf
    • https://wobafelu.weebly.com/uploads/1/3/4/6/134613510/vevixatemagujuf.pdf
    • https://static.s123-cdn-static.com/uploads/4472788/normal_5fee216c78bbc.pdf
    • https://puvedevedumu.weebly.com/uploads/1/3/1/4/131406841/5455724.pdf
    • https://dotofufodil.weebly.com/uploads/1/3/5/3/135313806/4812f73d.pdf
    • https://jufigewadekuxo.weebly.com/uploads/1/3/1/4/131406441/mabivakal-kimurek.pdf
    • https://sarisiwubaj.weebly.com/uploads/1/3/0/7/130739508/safabololukulo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://togusan.pbworks.com/f/wevil.pdf
    • http://watusuxipidu.pbworks.com/w/file/fetch/144423567/59004548369.pdf
    • http://tagexoba.pbworks.com/w/file/fetch/144421737/23428337183.pdf
    • http://tagexoba.pbworks.com/w/file/fetch/144422991/bahubali_3_movie_download_in_hindi_hd_720p.pdf
    • http://sepaxebi.pbworks.com/f/is_react_more_popular_than_angular.pdf
    • http://pevozowo.pbworks.com/f/nogopobidutibodukufokul.pdf
    • https://uploads.strikinglycdn.com/files/f6d3eede-5916-4fdf-b442-e074495b60db/how_to_paint_a_scale_model.pdf
    • http://foxobekizax.pbworks.com/w/file/fetch/144436311/introduccion_a_la_microbiologia_tortora_12_edicion_descargar.pdf
    • https://uploads.strikinglycdn.com/files/16a04fee-26a5-4797-9b6a-15c6b7f54397/begezo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc30.bin
41c31798a8d20e5e73bbe2ce66236eb2257f62c6113f63585b82d28c51fcd956		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC30 5284 bytes
font_01_sfnt_off0000ee2b.bin
b10e993790bd341a68945b2464f392c419a446bcb3ab356e4286697bbc72dabf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 10244 bytes

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