Malicious PDF — malware analysis report

Static analysis result for SHA-256 14fb557d00af1436…

MALICIOUS

PDF

69.6 KB Created: 2021-01-04 16:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: af137e1338d6c4a07d126fcc6066f630 SHA-1: 73f4268986f0267063965f21887fb49d51295869 SHA-256: 14fb557d00af14360eae8f6ac24b366ef685b1ac5dd9391d5f66ea9da828dc42
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, suggesting it's part of a link farm or phishing campaign designed to redirect users to potentially harmful websites. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, further supports the malicious nature by enabling dynamic content or exploit execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/aws?utm_term=all+of+me+chorus+piano+sheet+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8b62f6886c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447877/normal_5fbb341cf3e82.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/71fcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458394/normal_5fb9c9a3a9513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389097/normal_5fa9dbd667dff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481552/normal_5ff237dd126ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410002/normal_5f98a870abfdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_5f9d91ed3fbd7.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/564b5e0c-cc95-47d2-8269-5e5579fa6897/vomun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c42a900a-d5ce-4280-a7d1-1282cbe8a61f/download_drone_shadow_strike_mod_apk_android_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e909ac8a-78cc-42c8-9f15-97929630ada0/xiluruluwisixaw.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_off0000d4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F6 5244 bytes
SHA-256: 7948027c2ffc0406ba1470083b04929764f6de8fdc559491bb87dd244ceec1fa
font_01_sfnt_off0000e6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A5 10344 bytes
SHA-256: b219e9cb80e7234575838e40534fd50991ec04f300a7b630c3bbcc8de227b54f

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