Malicious PDF — malware analysis report

Static analysis result for SHA-256 915de121c3926050…

MALICIOUS

PDF

88.9 KB Created: 2021-07-13 19:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aef20ef079f447fca895e106195827b5 SHA-1: 7a193a04ec8498491c5c79553375619e7eabfd5a SHA-256: 915de121c3926050e3200751d8bd69c933e06c71efb050784d44fd3267fd5611
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains embedded URLs, one of which is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the presence of suspicious URLs suggests an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/sq/ugae/~3/XMoLd4EPXkg/square?utm_term=negative+exponent+to+radical+form
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8030c4454ab0ddd876ddc/1625817868189/how_to_download_fortnite_on_iphone_8_plus.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed21234182611181b33882/1626153251172/wizafop.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8fa1c27127e680414379d/1625881116272/arabic_to_english_dictionary_translation.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edb0349a9df7051d411c4b/1626189876453/cunning_definition_for_kids.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92639854c1d3b3487241c/1625892409474/wobodurasepi.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eda8b2573bc4731c8a8593/1626187954753/intersex_meaning_in_english.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec92b111a746407a428c1d/1626116785677/pidijonakut.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e78385c44a0c56b69e7cb2/1625785221326/employee_database_management_system_in_excel.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7897548fdc259403c013c/1625786741225/10273776386.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec9b1fe0784948549aa2c7/1626118943649/mevakavil.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7a08048fdc259403d7e17/1625792641007/beans_nutrition_chart.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93da18fb24157da710792/1625898401313/21655028643.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e922a266be7e490f0fa98f/1625891490502/cost_of_labor_and_delivery.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed31ec64a4563c8f7b0203/1626157548224/pounds_and_inches.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d520cb474813b85bdb21/1625871648109/illinois_property_tax_rate.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edaf89d2d00a35b8d1edfd/1626189705904/wotejekesab.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e94566c14ff043cd5e03f1/1625900390755/phenolphthalein_colour_change.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e87246dcc0950af0af3a8c/1625846343151/99821427881.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_off0000f41b.bin
8f4e060e24baeffae19edadb78feef6e494c09acb14effaabdcb1c8400664bac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF41B 18148 bytes
font_01_sfnt_off00012432.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12432 16792 bytes
font_02_sfnt_off00013c49.bin
14ad3e4d9fbc43f4d4f898d76c71aecc55cde27e5f175b8f8624eab689256c82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C49 10940 bytes

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