Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ed3616b347eb0e…

MALICIOUS

PDF

79.8 KB Created: 2021-07-12 21:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ace69c47d044bd468260e3b84a81cf4b SHA-1: 20a44783d68d8bdd9374038af58da9151ae629f9 SHA-256: 56ed3616b347eb0e41214c04e3823373838420d38881aebca81ac48cb6a943da
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 an embedded URI, although flagged as benign, suggests an attempt to redirect the user. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristic firings point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/sq/ugae/~3/uzX87CUNjRg/square?utm_term=how+to+do+old+age+makeup
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7b8c0afd06e4982e8c4c6/1625798848792/plagues_in_the_world_today.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7a0fbdd82073f6fe0dc0/1626110479672/12384354777.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e88473455dce08fe7d765c/1625850996050/movizi.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8e1069d4b6336147bb36/1626115600754/bruner_theory_of_instruction.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e4c1025aa46e30cf94eb/1625875649375/66288092636.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e898276f4c4060fefdb056/1625856039753/jesse_stone_mysteries_in_order.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8f89b5fa2eb14b909ff3b/1625880731420/66029813733.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7fde3a853d606aec1245/1626111966394/lie_groups_and_lie_algebras_for_physicists.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e76ebbcacc9126e3b26a44/1625779899416/modern_per_stirpes_example.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e879ebeafd98094073887b/1625848299273/words_with_z_and_n_in_them.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_off0000d92c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD92C 16792 bytes
font_01_sfnt_off0000f13e.bin
9edbd1e5fbf59ab6752a0e47e25fe5353a7abffe7c647894e3d08a0d6881656b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF13E 16120 bytes
font_02_sfnt_off00011b3d.bin
c570e2b2e6854435d37da665676b93df40b14e20f2b0bbc749b7a0d336ca6ed0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3D 10540 bytes