Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43e0f95e2ba610d…

MALICIOUS

PDF

77.3 KB Created: 2021-07-14 00:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c1c82ba6732c5aa2c03a3ad37e2345bd SHA-1: 1491c76c790dbe043b171d2438a38c3a40afbc5d SHA-256: a43e0f95e2ba610d4f4952cc64d0b804f5b792dc211c9daaabeed71660f24e0a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests a phishing or malware distribution attempt, likely initiated via spearphishing. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/CcIy6vlvkUk/square?utm_term=nfv+to+mp4+android
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7e6b0d838b6c850c57ad/1626111595700/closed_and_open_organ_pipe.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edd2a2017ec663b53b0cf8/1626198690946/super_punch_out_guide.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e77d5561166b169c4823c4/1625783637102/how_to_draw_celtic_knots_on_graph_paper.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edc6d0a0f2ca3483cf6811/1626195664383/93909448880.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edc87dc450ee47307c6103/1626196093557/sepuruxidorinap.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed7a40a17c7f1bf00434ad/1626176065112/how_to_create_a_mob_farm_in_minecraft.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec83d759713006cbe17db9/1626112983100/vanadenenelul.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e87d07609a93167f916233/1625849095102/nodoxuganuseba.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edffacd9d5ad70ebd64548/1626210221092/12399365066.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e90a965fa2eb14b90ac6d0/1625885334434/binding_of_isaac_online_unblocked.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_off0000ce39.bin
d79c9aadc4d6d2025beb175a414b0334adc04b724c8628bd8b2396c85ce9b87a
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE39 16740 bytes
font_01_sfnt_off0000f96b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF96B 16792 bytes
font_02_sfnt_off00011182.bin
db3b155f5874a5d96d6623574e515e55dfc683f6d327dd742860d68535e43d4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11182 10432 bytes