Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4c1203c4f54521…

MALICIOUS

PDF

60.3 KB Created: 2020-11-26 10:17:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7eccabea9840c7c2f03fc38fa01aaa1f SHA-1: 1b75feb87d552a4943ee93dbbdfe61de76e6f678 SHA-256: ce4c1203c4f545219bbefdbf7a77038df4cdadf6b4dc34a46af4675904f1c158
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, many of which point to redirectors or link farms, indicating a malicious intent to direct users to potentially harmful sites. The ClamAV detection and ML classifier strongly suggest malicious content, likely phishing or malware distribution. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL leading to known malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=rome+free+academy+football In PDF document text
    • https://cdn-cms.f-static.net/uploads/4482407/normal_5faa717b27bd2.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/8317813.pdfIn PDF document text
    • https://sawalodisixujig.weebly.com/uploads/1/3/4/4/134490012/3738775.pdfIn PDF document text
    • https://dotifusogibosu.weebly.com/uploads/1/3/4/4/134458831/2595018.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/binoge-pajutinara-kefafotusaw.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/tinajabizoreguf/tabopijudixatig.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/32302825271.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/asic_debt_collection_guidelines_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79efbbc9-0307-4875-a3eb-a43c5f6a1c5e/wesusajonaxewugib.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/adhesive_bonding_nptel.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/gutexez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6123e5b-21f5-49ed-a3c7-90c21aa5a7c7/41365134604.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/99722455494.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_off0000b1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EE 5236 bytes
SHA-256: 9d5374a482490820f686f90c83e5cb653c34e2590ce8b23daa07c239681ea369
font_01_sfnt_off0000c3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B4 9732 bytes
SHA-256: 9c643fd416c48615369f020d923615ac4598feb7a1e06332d96493b769e02f3a

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