Malicious PDF — malware analysis report

Static analysis result for SHA-256 040ffd6c1c852fc2…

MALICIOUS

PDF

75.4 KB Created: 2021-01-12 15:48:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0a7c0ffab3314a111639b65be4356f99 SHA-1: 471b03aa6c654084105b7ac84c84b96dee3abd35 SHA-256: 040ffd6c1c852fc2926faad35878804f3e3db1c57854136410791cf75e5848d6
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, which is likely used for phishing or to download further malicious content. The document body is heavily obfuscated, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://traffnew.ru/123?utm_term=charlie+brown+restaurant PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480886/normal_5fb4fb74591f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f9c4b0b34d6d.pdfIn PDF document text
    • https://gedaxafi.weebly.com/uploads/1/3/4/3/134340736/sosisalalo.pdfIn PDF document text
    • https://cdn.sqhk.co/ditutafewaw/FhiifIo/28104155796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488346/normal_5fabb9e304753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f87b3ac3e857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425772/normal_5f984192f2097.pdfIn PDF document text
    • https://cdn.sqhk.co/vevigagexoxa/gpjgggf/best_bollywood_dance_songs_of_90s_and_2000s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414851/normal_5f96338c8cc1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453102/normal_5fc86fe905514.pdfIn PDF document text
    • https://jakinamil.weebly.com/uploads/1/3/4/3/134391996/6221424.pdfIn PDF document text
    • https://site-1179563.mozfiles.com/files/1179563/the_communist_manifesto_page_count.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498994/normal_5fc7392d642ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5ff5d6ed1883e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE754 4912 bytes
SHA-256: a4495f2b726141ebf97e3b2c9fb1ae29a2d6495d5cc14fc345731e05324d7715
font_01_sfnt_off0000f806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF806 12148 bytes
SHA-256: d2ac70c255f8a0f8fb0580badc411e7bb568253edaf9fcc0e84bd57952a0fcb5