Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b0293ba44d2dfa…

MALICIOUS

PDF

76.3 KB Created: 2021-03-22 19:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17c667794326fdbcfae983e15f1648bd SHA-1: c8dfc4b9009e4bf235c8c0e9dad2e395421d5fe5 SHA-256: f7b0293ba44d2dfa25579944d0ee860b577dc7d38b0651c43dca70e9b32add93
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'multiplication worksheets pdf grade 4' and the embedded URL 'https://leonvi.ru/award?keyword=multiplication+worksheets+pdf+grade+4' suggests a phishing or social engineering lure. The presence of multiple unknown URLs further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=multiplication+worksheets+pdf+grade+4
    • http://muzibatixabu.mypressonline.com/92579912304.pdf
    • http://bolawixefop.mygamesonline.org/11158554986.pdf
    • http://fipizilemuwob.medianewsonline.com/interview_questions_for_teacher_assistants_preschool.pdf
    • http://lawexape.mygamesonline.org/borghese_gallery_guide.pdf
    • https://cdn.sqhk.co/woledibiroju/hi4khdT/chrome_for_linux._deb.pdf
    • https://cdn.sqhk.co/novimabe/b49khjm/bemezikepifetamif.pdf
    • http://morasuxod.getenjoyment.net/22024773755.pdf
    • https://cdn.sqhk.co/vemetafije/ihdqGjb/vusalufegal.pdf
    • https://cdn.sqhk.co/mogudekusab/irhfghV/offline_multi_language_translator_free_download.pdf
    • https://cdn.sqhk.co/zifeduwa/gjjdrLi/62542049365.pdf
    • http://xonigej.mypressonline.com/jidokukonuzijasegix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xefejevife/lemagebisoziges.pdf
    • https://s3.amazonaws.com/xakapudakadu/8599515315.pdf
    • http://nitubak.atwebpages.com/tuvusisoxigudutebakevas.pdf
    • https://s3.amazonaws.com/gotitibekovi/cadillacs_and_dinosaurs_full_version_apk.pdf
    • https://s3.amazonaws.com/tesotiwapax/le_corbusier_five_points_of_architecture_essay.pdf
    • https://s3.amazonaws.com/pusolefosex/84634678347.pdf
    • http://jisijuvod.myartsonline.com/telugujimutadal.pdf
    • https://s3.amazonaws.com/gotitibekovi/dofoboxatusujejipopug.pdf
    • http://widifusi.myartsonline.com/13373188438.pdf
    • https://s3.amazonaws.com/tedowafomaru/doorway_curtain_crossword_puzzle_answer.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_off0000ed41.bin
9e39ec126d5cb4386b157ba9c1cbd7f18fc9815065dadd892fb024dcb3870368
pdf-font-stream PDF embedded font (sfnt) at offset 0xED41 5664 bytes
font_01_sfnt_off000100a4.bin
7bca75c1822ecd1e9a3ae473cb7020158955ff595850547534af74ef7355206e
pdf-font-stream PDF embedded font (sfnt) at offset 0x100A4 10256 bytes