Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e1e5379a8455bc…

MALICIOUS

PDF

76.2 KB Created: 2020-12-18 14:50:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5b99cefa4aa516f14e0e4e090e705af5 SHA-1: c1d63aa28bfd61439a66a4e88dfa5ff4ec34d475 SHA-256: 22e1e5379a8455bcb687073d03d5ce71c883ac4e5ad3c5b5216b0a9ee2b1c302
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO spam campaign. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

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 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://traffset.ru/aws?utm_term=maplestory+cannoneer+equipment+guide PDF link annotation
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/41aeca1.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/rasurifevij-beleravexavonak-wokokoko-lilutomokolora.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377697/normal_5fc65a2f077f4.pdfIn PDF document text
    • https://duragafadave.weebly.com/uploads/1/3/1/4/131438389/b4393e9d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466676/normal_5fac521c5b994.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/fejatepudopito/real_number_line.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/tarunetedimefuvar.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/best_mountain_biking_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932632c9-b978-4187-983e-eed50f6acdc7/padosupekabazusuzonoxom.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/24239046321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf015ff-07c1-4790-8eca-57bcf917b040/6409995905.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/90801906130.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/american_english_file_3.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_off0000ea04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA04 5624 bytes
SHA-256: 1c1f6de451282c335eeb3ed606eba80a4c51ff5ab14f21ad2261a060ab03f6be
font_01_sfnt_off0000fd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1B 11452 bytes
SHA-256: 9756ce99ad7d371193f4d2f4aee3854af51e38027dcef12750b518460d3a48a3

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