Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca9f895d8e8fca0…

MALICIOUS

PDF

328.7 KB Created: 2021-03-17 05:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8075f54a53263d900421c75a1361dbe7 SHA-1: e1f201a85fac6c1191230d965f1dc13aae0b3f44 SHA-256: 3ca9f895d8e8fca0d50664a2e786927d15f44796cca71067c280eb3176ed0da2
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by a machine learning classifier and ClamAV, which detected it as Pdf.Phishing.Trojan. The presence of a 'download button' heuristic and an external URI pointing to a suspicious URL suggests a phishing attempt designed to trick users into downloading further malware. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=miracle+morning+pdf+in+hindi+download PDF link annotation
    • http://dogalijun.scienceontheweb.net/dasadudopoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_601b4cf26bf8d.pdfIn PDF document text
    • http://jowopejev.22web.org/aroma_simply_stainless_steel_rice_cooker_6-cup.pdfIn PDF document text
    • http://puxaxaguv.iblogger.org/how_to_get_medicaid_for_elderly.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/nujegujipogenizepuvobax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490128/normal_60483b7a86fb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475204/normal_5fe384a8d3cbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_5fd18a94b7fcf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446263/normal_600925e0e1b93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458633/normal_6010ebba89432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480389/normal_603c3e508d176.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_f2d95c99db9545eba980ad88a9ef3238.pdf?index=trueIn PDF document text
    • https://91313464-3f42-441e-b0e8-b27065d471ad.filesusr.com/ugd/ee9d3f_0b52b9e568444609aff2ae0dbe0f90ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/487ad858-fe18-415d-9c3d-f378db927767/rigajokarafemoniw.pdfIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_862a12101ff940eb830c1eeecb0d5131.pdf?index=trueIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_8aadae6c21a64a93a0710ce45e83e457.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ea76bf-fe50-42b9-8ec8-bb94d5dc6897/85846196128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9327c877-be81-4e8e-a7de-278e51b97a63/31206940499.pdfIn PDF document text
    • https://be8f41f0-9ddd-434d-ab6d-aa755a40b80d.filesusr.com/ugd/726d9c_73b6e834eabb4348b8c42b7c6377147a.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004c6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C6E5 5196 bytes
SHA-256: ae9c2c0abee9a9a56b7e090937a21921f754e47c057cc620c0db12e58c36efd4
font_01_sfnt_off0004d866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D866 13844 bytes
SHA-256: 01c278752b90cf3e00481d7580fbea791c06c750e8f39a0f0de1a3b2a789f131
font_02_sfnt_off000505c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x505C5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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