Malicious PDF — malware analysis report

Static analysis result for SHA-256 0531c6c9059132f1…

MALICIOUS

PDF

76.0 KB Created: 2021-03-06 07:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d1e9b5365340b22f54f22c48f98b0afe SHA-1: 3dd0c1dfc94083a941d790ceb9f802ec9327bb64 SHA-256: 0531c6c9059132f124aea3dadc278ab8034867ab5968f4d89540aa631414b021
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary focus on a link related to downloading Spotify Premium. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing unwanted software.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=spotify+premium+beta+apk+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501029/normal_5fe9a5cdc47f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407997/normal_5fe8bc00ad038.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422894/normal_60036b5f4da51.pdfIn PDF document text
    • http://zotonurapad.22web.org/53442059280.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/nixebiwajakag.pdfIn PDF document text
    • https://dotowukigirer.weebly.com/uploads/1/3/1/1/131163902/6745772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419193/normal_603f76e6d96d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456998/normal_5fdcf87812854.pdfIn PDF document text
    • http://gemosugobez.22web.org/tuxuwumasinu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444123/normal_5ff8c549eaacf.pdfIn PDF document text
    • http://botanilix.mygamesonline.org/can_you_mail_more_than_one_1096_in_the_same_envelope.pdfIn PDF document text
    • http://phtech.site/21771334734cc292.pdfIn PDF document text
    • http://autocredit.moscow/trouble_knock_it_down_lyricsv5bc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_6009eb5f36c63.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/zujeziniperuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://davofunup.onlinewebshop.net/41982922610.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_off0000ebf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF2 5508 bytes
SHA-256: 9046cbc45dffacb9fee85fa6d7c52795fe31f4f1287276c06fdf85fe15874c97
font_01_sfnt_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 10632 bytes
SHA-256: 89f38af1da5d77ba6471f7602cac9e55116cc35cf0172b921b0013c6827d713d

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