Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5368de4e827bc83…

MALICIOUS

PDF

73.7 KB Created: 2021-02-18 02:12:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 6494dd63cc7df6469b16355314c59e8c SHA-1: b004b08fa4f96e7e625861b97f6435bd034de0c7 SHA-256: d5368de4e827bc832a24a77587c06751164cffd6442ca00a24d5c9bbb50fe34e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL that leads to a domain associated with malicious activity. The document body, though heavily obfuscated, appears to be a lure related to free crochet patterns, suggesting a social engineering tactic to trick users into visiting the malicious URL.

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=free+crochet+infinity+scarf+patterns+for+beginners PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484115/normal_5fea0dc38666e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385014/normal_5fe651a4604fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481828/normal_5fdf5732efdbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389805/normal_5fe57d88550da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guganevefaluson.rf.gd/manual_refrigerador_brastemp_ative_inverse.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/65379620329.pdfIn PDF document text
    • http://lojurixerura.epizy.com/pabenuvotefaxufidis.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/61770012623.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/sample_pe_lesson_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/free_kindle_app_for_windows_10.pdfIn PDF document text
    • http://nawexox.epizy.com/segovezakikuvowujit.pdfIn PDF document text
    • http://wotixoweg.rf.gd/formacion_del_acido_sulfurico_ecuacion.pdfIn PDF document text
    • http://vevurikadi.epizy.com/zopamotob.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/babogiwugiwulixedowizoda.pdfIn PDF document text
    • http://pirafabitibabik.rf.gd/alan_walker_song_on_my_way.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_off0000e5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A9 5444 bytes
SHA-256: 7c43583b5142a697bc2d03261b79962cabf3f63338edcc769df10d785086d3d2
font_01_sfnt_off0000f834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF834 9700 bytes
SHA-256: 508ad1aeaf01acf5a02a39095aeeaea06c53a088ac4c21eec9e86ee404d88b48

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