Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecaf9e76ddbe56d9…

MALICIOUS

PDF

77.4 KB Created: 2021-03-24 11:01:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 921d03ee0316376543f4c5d6b6ce7833 SHA-1: 543c06589813485ee4165aab5061d598aabf7203 SHA-256: ecaf9e76ddbe56d905427ca52d130d19f6fadee7a279d2c7df1971d8c09cbd25
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it uses an advance-fee scam lure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf. The presence of external URIs, including one pointing to a suspicious domain, suggests the document is intended to lead the user to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://golowaki.ru/award?keyword=java+programming+pdf+free PDF link annotation
    • https://karegito.weebly.com/uploads/1/3/4/6/134626514/db318dde06.pdfIn PDF document text
    • http://domexogod.22web.org/how_to_do_an_exercise_plan.pdfIn PDF document text
    • https://fupodakabapamom.weebly.com/uploads/1/3/4/4/134489617/tosobumefames.pdfIn PDF document text
    • https://kokilanoru.weebly.com/uploads/1/3/4/0/134012510/dujisenep.pdfIn PDF document text
    • http://puzigodemabotod.iblogger.org/aluminum_panel_sheet.pdfIn PDF document text
    • https://gilulunerokife.weebly.com/uploads/1/3/5/2/135296548/mefexakamom.pdfIn PDF document text
    • https://fejunula.weebly.com/uploads/1/3/4/3/134363834/givoje.pdfIn PDF document text
    • http://zezarujewida.iblogger.org/jivakinajeluvuta.pdfIn PDF document text
    • http://java67.comIfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/kitchenaid_cooktop_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/98788064856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f7a3ab8-abb3-4c53-8d8c-01856db79357/suzudapesu.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/57557923470.pdfIn PDF document text
    • http://gofimegiwa.epizy.com/26112017052.pdfIn PDF document text
    • http://rokeboki.epizy.com/vewivutowavaxikadajur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f93eff-745e-49a8-80d4-1db9055ffbbb/fogolozuwolenajugup.pdfIn PDF document text
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_bb1371df58d940a1be1d61b197704d02.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8faa42-c31f-46db-981c-995e2a5d01a5/jesasikitovezizafotetu.pdfIn PDF document text
    • http://rabewifawilowe.epizy.com/carnatic_classical_flute_music_free.pdfIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_4379af4f27144ec59b4f41cc2def48b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/why_are_social_research_important.pdfIn PDF document text
    • http://tesoxukezeziles.epizy.com/14564655762.pdfIn PDF document text
    • http://javarevisited.blogspot.comIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19D 5200 bytes
SHA-256: ace5e8eef236362112c3b3f45f8cbf5cc787d3d2bb6d77e973d70d6864a8e1eb
font_01_sfnt_off00010348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10348 10872 bytes
SHA-256: ed520bc6ca0bd9fe2af6c0bb584a22af94222edb932f0180812a1a5bdb1ac8e2

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