Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56f2a8f86aaf343…

MALICIOUS

PDF

87.0 KB Created: 2021-07-21 15:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 242e0d35bacc993fd41ee810045048c0 SHA-1: 404dff1b46fb6ef8eca5226fc68167d02adf59c3 SHA-256: f56f2a8f86aaf343905b92aacc643c42d57f6dbdd71ca1f3c56d6d0df4dc64df
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs suggests it is designed to lure users to external resources, likely for phishing or to download further malicious payloads. No scripts were extracted, but the overall structure and detection indicate a high likelihood of a spearphishing attachment leading to exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/RVI1sXQGPkU/square?utm_term=solids+have+a+fixed+shape+because
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f7a64986bb0f6714793809/1626842698020/jaleg.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1b96187a90a4733df27b7/1626454369377/22744194103.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f324c622602c08caedb05c/1626547398030/trunk_or_treat_definition.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f033e71e1a563dfb9080ba/1626354664195/wofedotatosebatijo.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f1c30e8261f1143406777d/1626456846850/dynamic_stretching_exercises.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2cb8d54c26a0cc3f54259/1626524557366/27784224554.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eda5de834e745de9d155dd/1626187230136/21353509373.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7b0db38ed220952ab5671/1625796827664/black_ops_3_ps3_zombies_maps.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e00ac14ff043cd5951ce/1625874442976/87673996131.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f7c28e3bf5736ec389c0f7/1626849934911/cleanmymac_3_cracked.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3c91f6d5e991e36e5124f/1626589471556/gnocchi_and_ground_beef.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edf5a89942ff19c769f024/1626207656949/creating_a_ppt_template.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f78c67c92ef868b92136c6/1626836071853/printable_dinosaur_coloring_pages.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edae6ff53e3457ef884074/1626189423391/gefuxujuburogikaxivitetev.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee8a8f7426fb5109f8d9ca/1626245775488/used_ovilus_3_for_sale.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e783a6ac38336747adff59/1625785254802/garetijovujuda.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3303fc4d0d61e673686d0/1626550335647/airpods_2_directions.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f49ef1ec5ad00cc09e5c1c/1626644209405/49813973926.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f6ce89406ccd26e78ef76b/1626787465983/27632000550.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed18c7c76d6b0ba00a3a4f/1626151111766/management_accounting_concepts.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee8143e7148d06bc74a7a8/1626243395458/storm_shield_one_pve.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee727ebb85ab7f02c017f2/1626239615048/7104244359.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0262e086977531730d5d9/1626351150524/25190747977.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f4bd3729712869f077545d/1626651959436/97567465111.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_off0000ef38.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF38 16792 bytes
font_01_sfnt_off0001074a.bin
a41a9cee7478e30328791521478520f208ee088db817a6545a257e298e180c3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1074A 17400 bytes
font_02_sfnt_off000134a8.bin
475e43f8cb432f4e92fa5a6cb6d815cef2601b90d2d4e69e5f45ebd1fee868da
pdf-font-stream PDF embedded font (sfnt) at offset 0x134A8 10900 bytes