Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca3605ff26a9c80…

MALICIOUS

PDF

64.7 KB Created: 2020-11-30 00:24:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2e518013d5c5414829aff369f70bcfec SHA-1: 17e8b1df7a0a1d85e87f6c219e6a9d2a141a98ed SHA-256: eca3605ff26a9c80f67f7f4ed3c6672b2a02ffeffbb45ef4f0bd38444560f4d5
104 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a domain associated with phishing lures, and the document body, though heavily obfuscated, suggests a deceptive context related to 'persuasive writing exercises'. The presence of a download button heuristic further supports the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/wb?keyword=persuasive%20writing%20exercises%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375705/normal_5fb6420b00df3.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/javar-pagobud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_5f8dde43c9d41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388174/normal_5fb4222f97624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420903/normal_5fbf3d08b3701.pdfIn PDF document text
    • https://naxibozagut.weebly.com/uploads/1/3/4/5/134580084/kamoxofutewefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425255/normal_5f9e8f61bfc49.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/tinivukedeta/arsenic_contamination_in_west_bengal.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/frame_picture_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/tuwagumizexomovogalut.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/21121898903.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/name_of_sc_oh_3.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/spellbound_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/27538338687.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_off0000c131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC131 5512 bytes
SHA-256: 51610bf8da2a82d01f8da5a010325f01a2f1f5c76141217e1eb5beb292152689
font_01_sfnt_off0000d41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41B 9936 bytes
SHA-256: 5982fa2c3f3f61df393e31b08ea537de330454fa5374188d2f3561f485d16c8c

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