Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa277f0a3d25e906…

MALICIOUS

PDF

80.9 KB Created: 2021-04-02 02:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ce5a538f304904057e6d6ba120a6107 SHA-1: b85fe335fbf471e6be70bed7586704705bc8e873 SHA-256: aa277f0a3d25e90647e612810a27ee2e8c10063a8331521d31a863ca24b54989
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or scam campaign. The document body, though truncated and partially garbled, suggests a lure related to "Asian paints distemper pdf". No scripts were extracted, but the presence of external URIs and the nature of the detection suggest a phishing attempt.

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://jacksth.ru/award?keyword=asian+paints+distemper+pdf
    • https://static.s123-cdn-static.com/uploads/4366063/normal_5ffdfaf295660.pdf
    • https://cdn.sqhk.co/kojuzipag/ghehg8v/mesodaminifanifimokixuwug.pdf
    • http://tijudozi.scienceontheweb.net/vafamowunovakefulebirimi.pdf
    • https://cdn.sqhk.co/laxefotogulo/fTjfhhm/97762623947.pdf
    • https://static.s123-cdn-static.com/uploads/4387928/normal_5ffa7aad28dbb.pdf
    • https://cdn.sqhk.co/vasegodesazu/FjboP2L/8665489723.pdf
    • http://wumomotetidofe.getenjoyment.net/does_lowes_sell_troy_bilt_riding_mowers.pdf
    • http://wukosuwusa.iblogger.org/technical_program_manager_resume_template.pdf
    • https://cdn-cms.f-static.net/uploads/4457296/normal_604bc415bafa6.pdf
    • http://zixudivibudizu.scienceontheweb.net/70492735916.pdf
    • https://cdn.sqhk.co/naziwixolagu/igvhjhb/electric_drum_kits_for_sale_australia.pdf
    • https://cdn-cms.f-static.net/uploads/4405903/normal_604182b70374d.pdf
    • http://faxusigeroles.sportsontheweb.net/abraxane_package_insert.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wuluzakasuw.epizy.com/81252617028.pdf
    • https://uploads.strikinglycdn.com/files/c82169fe-8b51-4588-a3b5-66473142309c/resmed_airsense_10_autoset_cpap_machine_reviews.pdf
    • https://uploads.strikinglycdn.com/files/337e2d30-62ab-413d-9661-a5ae5c23ba04/nikon_p-tactical_223_rifle_scope_-_3x-9x.pdf
    • https://uploads.strikinglycdn.com/files/88b1bb36-436f-4136-94c4-3d5a104cc768/what_is_a_spell_save_dc_5e.pdf
    • https://uploads.strikinglycdn.com/files/cd302826-65e0-48d0-a925-3d672c9b7104/kunefavuxanubigire.pdf
    • http://latevafizatum.rf.gd/numerologia_22_conny_mendez.pdf
    • https://uploads.strikinglycdn.com/files/6d3e1ff2-417d-4e29-a6c8-95b80b8adb0b/how_the_miracle_morning_changed_my_life.pdf
    • http://sabulawum.rf.gd/chapter_two_literature_review.pdf
    • https://uploads.strikinglycdn.com/files/54b0961b-12ed-4c75-8d71-47c70f4f238b/xuvujaxumamatutemapom.pdf
    • https://uploads.strikinglycdn.com/files/9309baac-46cc-49c9-a35b-a9889960074a/zebra_gk420d_label_printer_setup.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_off0000ebf4.bin
cc07be9b18ab0a118fe937e904656c224a3563f14658be816de15d51564a5677		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 5144 bytes
font_01_sfnt_off0000fd5f.bin
0c5120881c2baa89843a7fdca40eafbebdeadf09702ccde176284083cb8e5dc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 10352 bytes
font_02_sfnt_off000120cf.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120CF 16164 bytes

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