Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa8d5274dd6595a…

MALICIOUS

PDF

81.7 KB Created: 2021-03-02 12:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 379728d136e7281b6adc47cb51820860 SHA-1: cc79f6190c0fc831d300a525260a699f53e81dd5 SHA-256: cfa8d5274dd6595a944e173c45d1615dc557f7cdb3b317e3f6f8b4ca023f3418
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URL pointing to a domain associated with malicious activity, disguised as a worksheet. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is designed to deceive users into a financial scam. No scripts were extracted, but the presence of an external URI indicates a potential for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/wix?keyword=geometric+probability+worksheet+9-6
    • https://static.s123-cdn-static.com/uploads/4369305/normal_5fc6d59b8f8d4.pdf
    • https://cdn-cms.f-static.net/uploads/4464083/normal_601b3e43b5564.pdf
    • https://static.s123-cdn-static.com/uploads/4447086/normal_5fcd096e68fe2.pdf
    • https://cdn.sqhk.co/bigulikexupa/jeW6ggQ/23111442863.pdf
    • https://cdn-cms.f-static.net/uploads/4450517/normal_5fdb04ddc6036.pdf
    • https://cdn.sqhk.co/livaxipovage/a3hagjf/gedizokivemopuduwefaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zawumowu.rf.gd/lavezepudazivagupapafi.pdf
    • https://s3.amazonaws.com/rodiligarexo/autocad_2015_keygen_32_bit_free.pdf
    • https://s3.amazonaws.com/mefadedosuw/beretta_transformer_medium_soft_gun_case.pdf
    • http://xefukogan.rf.gd/time_clock_spreadsheet_free.pdf
    • https://s3.amazonaws.com/tawosutosuxi/vejanipadugimuxurutujor.pdf
    • https://s3.amazonaws.com/bezegoluzose/vmware_vcenter_trial.pdf
    • https://s3.amazonaws.com/kavifunaruvi/has_forged_in_fire_ended.pdf
    • http://fawogalupa.epizy.com/71279744310.pdf
    • https://s3.amazonaws.com/gurupixabogivaz/morphology_of_foraminifera.pdf
    • https://s3.amazonaws.com/wolina/kafeberanirevu.pdf
    • https://s3.amazonaws.com/rumezo/bedsheet_toga_fancy_dress.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010197.bin
40c8995c17519c60a0206cf5f3edbc49258bd94bb7295f1ac18be4e1249e8f12
pdf-font-stream PDF embedded font (sfnt) at offset 0x10197 5944 bytes
font_01_sfnt_off000115bc.bin
cce57082c326aa4c991b0b51fbc553fc38343015860125e8823e50f94ea2020a
pdf-font-stream PDF embedded font (sfnt) at offset 0x115BC 10440 bytes