Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f13c99794ffc0c4…

MALICIOUS

PDF

90.4 KB Created: 2021-03-22 04:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c16cf2ae82454dad2cb823958034e71 SHA-1: d17be07b701950d2b5f2d8a14b9442a280c864da SHA-256: 9f13c99794ffc0c4f7b0fbb035c6f0444d5dcbd1eb1f781271caeaa634a58d37
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain text related to a 'Britax pinnacle clicktight manual' and the malicious URL, suggesting a phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://ponafet.ru/wix?keyword=britax+pinnacle+clicktight+manual
    • https://cdn-cms.f-static.net/uploads/4379601/normal_604066a590138.pdf
    • https://static.s123-cdn-static.com/uploads/4407081/normal_5fe3de38c97a7.pdf
    • http://numulul.mygamesonline.org/how_to_study_for_ap_human_geography_test.pdf
    • https://static.s123-cdn-static.com/uploads/4403131/normal_5fc6f9c5be203.pdf
    • http://nosilekexiwot.mywebcommunity.org/microsoft_balance_sheet_2020.pdf
    • http://igonlinesupport.com/where_can_i_get_rental_agreement_formw8w90.pdf
    • http://ecoterritory.store/watch_jack_reacher_never_go_back_netflixqv442.pdf
    • https://cdn-cms.f-static.net/uploads/4447884/normal_5fd390e1a81ba.pdf
    • https://cdn-cms.f-static.net/uploads/4366375/normal_60463529ce235.pdf
    • http://mantenancie.com/tuzubozetavipix8vt6.pdf
    • https://cdn-cms.f-static.net/uploads/4372378/normal_60412433d17e8.pdf
    • https://cdn-cms.f-static.net/uploads/4404490/normal_5fe84896f0102.pdf
    • https://cdn-cms.f-static.net/uploads/4388825/normal_6040b4675442c.pdf
    • https://static.s123-cdn-static.com/uploads/4486758/normal_5ffeb45a640f7.pdf
    • http://xogunajeraxuda.mywebcommunity.org/taurus_g3c_vs_g2c_size_comparison.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/164f2054-74c5-4de0-8644-173a53a488f5/how_to_switch_on_wps_on_router.pdf
    • https://uploads.strikinglycdn.com/files/1a7263f3-c26f-4ea8-956f-2ed8bb49925c/67795711855.pdf
    • https://uploads.strikinglycdn.com/files/1e23b734-1e9e-4c94-87ae-2b7906abb191/sopa_de_letras_para_imprimir_gratis_dificiles.pdf
    • https://uploads.strikinglycdn.com/files/8151e08b-696a-41d0-a247-bd6b563b580d/74495066586.pdf
    • https://uploads.strikinglycdn.com/files/c5d8dc7f-1e88-4fef-8bce-7e2126ee494c/63977013852.pdf
    • https://uploads.strikinglycdn.com/files/862b0487-192e-4e0a-9f54-10c8a2b3f3d4/97899101438.pdf
    • https://uploads.strikinglycdn.com/files/02cc1d46-343c-4bc4-9872-7a52e0955cd3/how_do_you_make_chicken_casserole_in_a_slow_cooker.pdf
    • http://nozozuwovore.atwebpages.com/fadudiwe.pdf
    • https://uploads.strikinglycdn.com/files/bbf81834-913d-4290-a1ed-f52c387c0746/the_dead_and_the_gone_summary_by_chapter.pdf
    • https://uploads.strikinglycdn.com/files/69b252df-e694-4bfb-bd23-363c09dfbcac/david_attenborough_a_life_on_our_planet_timeline.pdf
    • http://lopakesuzuw.atwebpages.com/adversus_haereses_portugues.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://scripts.sil.org/OFL
    • 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_off00010c05.bin
4cd6fd23af8b11d1393ee8c3e5f6addbcb18c2d591f100d93146afefd1c14313		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C05 5352 bytes
font_01_sfnt_off00011e10.bin
fc717e1580f316d05931cf2e829824e91b26d4734f5784fc3883f61913ecb9c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E10 12324 bytes
font_02_sfnt_off000145af.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145AF 16204 bytes

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