Malicious PDF — malware analysis report

Static analysis result for SHA-256 811ba5588064881b…

MALICIOUS

PDF

69.0 KB Created: 2020-11-11 06:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dec35b36b3a7cfed4370f000160ffd9d SHA-1: 1b2a1f54b738d7f6a8797f640c81615b803de513 SHA-256: 811ba5588064881b1ce21e51d46c7babc7777994822e306be4f44d1bbedb8a6f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, likely intended to trick the user into visiting a malicious site. ClamAV and ML classifiers strongly indicate malicious content, and the PDF structure includes external URI references. No scripts were extracted, but the overall pattern suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/aws?keyword=warriors+firestar+quest+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tibanepoxilibud/34605394784.pdf
    • https://s3.amazonaws.com/xojafemori/acer_aspire_one_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/ad2671b6-b79a-4c12-a81f-1d4c51a5dd5c/73534533046.pdf
    • https://s3.amazonaws.com/fojaxexino/72655955700.pdf
    • https://s3.amazonaws.com/kezemiradigu/xia_legends_of_a_drift_system_ebay.pdf
    • https://s3.amazonaws.com/jamokaroxoj/fofobademetarasiba.pdf
    • https://uploads.strikinglycdn.com/files/8fe573cc-f407-489b-94cd-87848a3e0d63/isfas_sede_electronica.pdf
    • https://s3.amazonaws.com/risalenefazozo/journey_across_time.pdf
    • https://uploads.strikinglycdn.com/files/7cb110b0-7aaa-4add-a0aa-2fa6cc8ed18c/gewejuberitodus.pdf
    • https://s3.amazonaws.com/safago/9059925647.pdf
    • https://s3.amazonaws.com/dinilederu/15949062175.pdf
    • https://s3.amazonaws.com/nopomewegobij/mechanical_engg_drawing_symbols.pdf
    • https://uploads.strikinglycdn.com/files/ee657286-cbb1-4df9-84b1-5c422dfd8fdc/nathaswaram_tamil_songs.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf3b.bin
54485026b541e3de20d9dc0be8b46ddd98c92db7b80c0f9fab6fcd7949e123a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3B 5140 bytes
font_01_sfnt_off0000e0d4.bin
d6fea6873eded1b9707a70a0dfa67abc74624a11c84fb4deb032086f960e2fb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D4 11676 bytes

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