Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be5e3be3a70cf68…

MALICIOUS

PDF

67.1 KB Created: 2020-12-22 04:30:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f57254cfb9f010a06e2d84c4ac73e7c9 SHA-1: 8020619ffce7adf3318a89bc26841627b7a95e10 SHA-256: 9be5e3be3a70cf68dc3b45c95cfbc8e4f14c7b2b40131e6afe7b31c38dfea02e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of numerous external URIs suggests an attempt to lead the user to potentially harmful content, aligning with phishing or malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/strik?utm_term=color+wheel+ideas+to+draw PDF link annotation
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/0f42ce86725c39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5fbe22d9e57ba.pdfIn PDF document text
    • https://puzamadexid.weebly.com/uploads/1/3/4/6/134640865/bilamu.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/tobojelusiwi/el_barril_de_amontillado.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/metallica_creeping_death_guitar_tab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b136039d-0b85-46fd-b864-ab0f9eefe1ce/genaratas.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/vigolijewutuvum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db1d8442-963c-4228-9125-7b3071c7920a/19921419081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c5a91a-af64-4706-8490-4e3cb0988df7/9411125693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3403af7d-409f-4df4-b05d-c0b7370b7fd3/cinderella_ii_dreams_come_true_2002_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30af46dd-de7e-4e2b-85c2-823506711b48/hollow_knight_pantheon_charms.pdfIn PDF document text
    • https://s3.amazonaws.com/fizijosoraginu/houses_for_rent_in_chesapeake_va_by_owner.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_off0000cdaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAA 4912 bytes
SHA-256: e38e390fe8f3b4585bec75a1714f9f96ba065ef4ff3b1ebf920fda60b13abb84
font_01_sfnt_off0000de5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5C 9992 bytes
SHA-256: 3a4f736ecf1fe4a46990ea52042360f5131b4825f9bc94f3b40a110a6f364dd8

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