Malicious PDF — malware analysis report

Static analysis result for SHA-256 d283f48edc70b909…

MALICIOUS

PDF

77.6 KB Created: 2021-03-23 03:26:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76d1afc7da612fbceeff5781ab3925d2 SHA-1: 5191bae4165ab255f3d419beed3ae71887628ad3 SHA-256: d283f48edc70b909a45b98787f92c7c3a57b742763fbdb2951c25241377936fb
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. The document body, though heavily obfuscated, contains keywords related to product searches, suggesting a lure to entice users to click the malicious link.

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://gimoguvi.ru/wix?keyword=fitbit+charge+hr+charger+uk
    • http://xploitcrew.io/rilazomusesuvobavajabafoaa0l3.pdf
    • https://static.s123-cdn-static.com/uploads/4495039/normal_5ff75c62ac479.pdf
    • https://static.s123-cdn-static.com/uploads/4426820/normal_5fe3b0bf25940.pdf
    • http://pubguckazan.com/71267722095qdloq.pdf
    • https://cdn-cms.f-static.net/uploads/4465147/normal_5fe982ea01b15.pdf
    • http://it50off.pro/livibuvavepemadexesa0vjhe.pdf
    • https://cdn-cms.f-static.net/uploads/4479446/normal_6047602c3b12e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/345676de-f0f1-41cd-976b-8dfcfa4378d3/13168425421.pdf
    • https://s3.amazonaws.com/tetofamuxulil/zukibitepugisivazobipoto.pdf
    • https://s3.amazonaws.com/pazerogasarinu/financial_reporting_quality_and_earnings_quality.pdf
    • https://s3.amazonaws.com/lakadutof/rijuvibuluvebaxilovaxulin.pdf
    • https://uploads.strikinglycdn.com/files/876a3f08-34f5-41fe-99b3-e777a2f76f72/votuj.pdf
    • https://uploads.strikinglycdn.com/files/b6a1178b-be95-452a-a0cd-dc8ab10ae0f4/que_significa_tener_un_estilo_de_vida_saludable_segun_la_oms.pdf
    • https://uploads.strikinglycdn.com/files/db791352-14ad-43e7-a31d-a688f59b1e94/mafizomitaliwazikolis.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_off0000f2df.bin
2bd7b61f2151f18d902ffeb10af5032bb78a64d89384be62f129e14d173e441f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DF 5008 bytes
font_01_sfnt_off000103ea.bin
5380c399c956b560d4975efa120ddd825116d6773c02ef3b9e10090934e2071a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103EA 11144 bytes

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