Malicious PDF — malware analysis report

Static analysis result for SHA-256 f277709211ece371…

MALICIOUS

PDF

130.3 KB Created: 2021-02-18 04:56:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 85724510d057954c4aa227f7eb23e127 SHA-1: f381d9891f1920a70afaea7ad1db8c230fcd0822 SHA-256: f277709211ece371cf6edf5547d83b5752af61f3d3cda8f7be7687eb39ad3c43
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The PDF structure and embedded content suggest an attempt to disguise malicious activity.

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://leonvi.ru/wix?keyword=animal+classification+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4503524/normal_6022674b2787b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530429/normal_5fe964e7c164d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489041/normal_5ff689bbe2c98.pdfIn PDF document text
    • http://xexisutufas.iblogger.org/writing_learning_objectives.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/i3mNhad/63027350571.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/ghoghhc/spider_stickman_rope_hero_2.pdfIn PDF document text
    • https://cdn.sqhk.co/forexidof/ficMIgg/37539119752.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393785/normal_5ff9dfb5361f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370286/normal_5fcb392adca46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366325/normal_5fef98f8e7334.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/od0ijic/bingo_halls_las_vegas_nv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451542/normal_5ff991b0602e3.pdfIn PDF document text
    • http://vajamerafimal.iblogger.org/physics_distance_and_displacement_worksheet_answer_key.pdfIn PDF document text
    • http://xirixakexove.iblogger.org/rideniwikovuwojos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418764/normal_5ffa5204060b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://robexekipojop.rf.gd/mafanabomaxogedo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/bible_for_java_320x240.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_off0001c658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C658 5196 bytes
SHA-256: 9a5de9bd179cc27717dafecd934a564002c33a5df9dae51b66e75af6fe2ee2bb
font_01_sfnt_off0001d7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7F6 10452 bytes
SHA-256: f8d951cc6c6ef940b0db9c2164d7d7e24005ec585b56450fc425954641e8a626

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