Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c9293f491fd794…

MALICIOUS

PDF

75.6 KB Created: 2021-02-21 11:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62cc7437882111d573e919a79af0a842 SHA-1: 78fe10e128764af01ee13e97c8c5dd90e4fbe281 SHA-256: 54c9293f491fd7949846ca89c48470e3fb82741a9e37d7cf1d8bbaa370bfd7c8
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'druttle.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'agile methodology vs waterfall pdf'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing or malware delivery 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://druttle.ru/123?utm_term=agile+methodology+vs+waterfall+pdf
    • https://cdn-cms.f-static.net/uploads/4485927/normal_5fd71a0aa3702.pdf
    • https://cdn.sqhk.co/gasubapo/ggxiaCM/kumumikorurixekufibo.pdf
    • https://sevujixosatanin.weebly.com/uploads/1/3/5/3/135316334/bodawumutezumelug.pdf
    • https://static.s123-cdn-static.com/uploads/4412999/normal_5ffe8b02254d7.pdf
    • http://serdyukov.pro/2010_chevy_malibu_ecm_issuesc9fr4.pdf
    • https://zigivigafa.weebly.com/uploads/1/3/5/3/135392575/zorodowuvivat.pdf
    • https://nubipudovolena.weebly.com/uploads/1/3/4/0/134012318/tiregagugilex.pdf
    • https://cdn.sqhk.co/borefigux/ethhihL/golden_dragon_hamilton_lunch_special.pdf
    • http://trickyturkey.com/vewevovadodipilebuuiiww.pdf
    • https://static.s123-cdn-static.com/uploads/4465705/normal_5fcba48b1fcc3.pdf
    • https://pepulumowuso.weebly.com/uploads/1/3/2/6/132681954/793c400852.pdf
    • https://cdn.sqhk.co/kugefiruxat/DkjiU3v/nokoxowopabesivo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jofunozuzof/bitterne_park_primary_school_ofsted_report.pdf
    • https://s3.amazonaws.com/befarekogol/vunitukiziwimiwul.pdf
    • https://s3.amazonaws.com/vavapekadoliti/28970793003.pdf
    • https://s3.amazonaws.com/jepavilutabilel/55121434045.pdf
    • https://s3.amazonaws.com/jemisajoda/legimikikigup.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_off0000ec65.bin
1e9e87c451f72323ffc537620473056a6b422b9d1706fbed7b5a8445f9875269
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC65 5696 bytes
font_01_sfnt_off0000ffc5.bin
f883b450fe05c9f7f5448acb96aae22153ce179bcd15cee9c0aa82b2a2f22c3b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC5 9680 bytes