Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e2c2b4617ca742…

MALICIOUS

PDF

62.9 KB Created: 2020-11-24 19:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e78481dd3fa6724af92fede403a30bc1 SHA-1: bfe3f4d38006082a3b50217f933bfd5abb46e94e SHA-256: b4e2c2b4617ca742f1da6056f0a1319a3f95c6ddae7de382553056af82520356
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, many pointing to PDF files hosted on services like Weebly, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text that appears to be a lure related to "Boyhood and beyond", likely intended to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/strik?utm_term=boyhood+and+beyond PDF link annotation
    • https://nurosamemozixa.weebly.com/uploads/1/3/4/3/134375837/zowuzatelanijos.pdfIn PDF document text
    • https://murexaxinafol.weebly.com/uploads/1/3/4/4/134456221/guzetu_gufowinij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_5f9dcfa4dd7a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_5f93e10eaec61.pdfIn PDF document text
    • https://bijufipenonovo.weebly.com/uploads/1/3/4/5/134529550/woxafeva-kejinoga-mulem.pdfIn PDF document text
    • https://rukazoxet.weebly.com/uploads/1/3/4/0/134040508/51e9325916683.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/2ef8dcc4-63c7-454a-bcd1-3ff558c7d3d1/nuwixukizatubuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56dd0b65-c16a-4592-b679-3731a4dc1d42/kasamipuvefemosaxokire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a864b91a-d585-4a0a-819e-125c9c9656ba/25323654480.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/zitafovobatosupe.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/96817396336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a953bbf-fb55-4f0c-9b43-82775cba0f0a/13313406021.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/10645259185.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/happy_birthday_stevie_wonder_sheet_music_free.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_off0000bba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA2 4896 bytes
SHA-256: c8c9f2a61e3f53b35ea8ed5f0dd0d91d73691f28d3cba8a0dc755e046fd336a9
font_01_sfnt_off0000cc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4F 10256 bytes
SHA-256: a5f66a71eac65556581f377808cb16026ff7f6976ebc4fcdc6a07955b566d540

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