Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad412fe0f169864d…

MALICIOUS

PDF

107.9 KB Created: 2021-07-15 19:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fb0a2a8c4b529ae8d1ffb7455957ed2b SHA-1: 938b4a5a3e6ff4c77043a8a669f36139b9a8ff7d SHA-256: ad412fe0f169864d51efaeed9f196dc066062774b4ad35b269d9da1441fe7e12
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. The PDF structure and embedded artifacts are consistent with phishing or malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://feedproxy.google.com/~r/razvivatel/yapz/~3/0YvHz_IItD0/square?utm_term=bee+sting+on+my+head
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec94e39cb57f380a790c69/1626117347693/movie_quizzes_and_answers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec877b67baa26076bc2cfb/1626113915481/89242090351.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f024e5e9d3bc6103ff15c5/1626350821190/almond_serving_size.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee0b8033d4654651b9737e/1626213248786/sopobixevutowepidum.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7ab848ad60325f0c3b4f9/1625795460863/dna_polymorphism_meaning.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eddc75a9d1f62037e28419/1626201205596/optical_illusions_with_answers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e96719dc37083541bac71b/1625909017747/vil_meaning_in_english.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7cce152059f1ec1e37c50/1625804001863/pinacol_pinacolone_rearrangement_in_cyclic_compounds.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8eda9cb57f380a787201/1626115802781/my_albumin_is_low.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eddcbfebcbe27d0c7db077/1626201280050/parivubigedozarelewun.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000145b6.bin
38aba97c4e837e4cda0771ea3d17f498f0110a8a8c0c66cbcc1694c5353087d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x145B6 10716 bytes
font_01_sfnt_off00015df9.bin
1c0135e716b16922acc36e5a841534a262b60d83a4eff19f3ccdd9eab0c8f711
pdf-font-stream PDF embedded font (sfnt) at offset 0x15DF9 17456 bytes
font_02_sfnt_off00018b7e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18B7E 16792 bytes