Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9806fe2ed9b990…

MALICIOUS

PDF

69.1 KB Created: 2021-02-25 12:22:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 031b9a126336a459aa538029d2dc652c SHA-1: e6bfd0f54192d0592e2458e4e2df2c3515959b9a SHA-256: fc9806fe2ed9b99044e654f693e065f2c63172ba43a17100c41265dcadfd47ee
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains multiple embedded URLs, with the primary one being https://jottigo.ru/aws?utm_term=bissell+symphony+pet, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URIs and the malware detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://jottigo.ru/aws?utm_term=bissell+symphony+pet PDF link annotation
    • http://vijufik.iblogger.org/aptitude_and_reasoning_topics.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/the_lying_game_cast.pdfIn PDF document text
    • http://petrol-v-pol-price.site/sesujekotasp74c5.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/lasejedoxibub.pdfIn PDF document text
    • http://rekipeva.iblogger.org/uganda_passport_application_forms_a_and_b.pdfIn PDF document text
    • http://ritixabig.iblogger.org/wuvositabijaxozojetuza.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/divelikubapiwaj/80707544095.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/giwivutelukekewovop.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/integral_calculus_calculator_apk.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_off0000d411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD411 4904 bytes
SHA-256: fc584e4938e7ba473307732cbb58b5f49fad1ebeea014179ed4e769839de6cd7
font_01_sfnt_off0000e4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A7 10396 bytes
SHA-256: 0da62c4abcaa7e22391bf700df25456433ff18a63dee62fbfb131f01560d50d4

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