Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd41115d8fa4168…

MALICIOUS

PDF

87.2 KB Created: 2021-06-10 17:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bccfced9aa32a5eb930801a14e3d83d0 SHA-1: e94b84bd603dd8b4dffb91da08b37dd74699358b SHA-256: bbd41115d8fa416847f045aae76a95dfec9195025c153cb9c649034389482d40
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/pbw?utm_term=minecraft+pe+1.16+nether+update+apk+download+free+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368218/normal_602ec2eb90d05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479710/normal_6001aa99d6dc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_60134b3da6066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475397/normal_6017bfaf3b43b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416318/normal_6001e580ec16e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_600a8fbeb97f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487927/normal_5ffae67863b0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480758/normal_601460d252d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490274/normal_5fe83d4ed9c68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_601d0ee3736b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417314/normal_6002764a95a79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_601dff7f3418a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/853e52a5-ab11-404a-8bfb-5f7ebe87d451/83724741063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6872060-27a8-4450-aef6-2c4cfb27a916/what_are_some_methods_for_assessing_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9b85d60-3195-48f8-9e33-9f78ed433370/what_is_the_computer_engineering_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb428188-e26b-4f70-9991-ceb51e47fbd3/koginarufipulekaposom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7eee5d5-b873-47a1-be05-c282453430bf/fonanawivoboxuwavate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcaeba4b-8fd4-4352-b873-1005ba3c995a/what_is_gnostic_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8a2e93-087b-4de6-93f0-84ad65c10da2/12762340933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0728189c-182b-4027-ba2e-74d135e6696f/sample_civil_construction_company_profile_word_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d47803-4ac3-4173-90e1-b23e6260d271/standard_reduction_potential_table_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9c8c8e-b08f-48e9-8ab7-1fe48fa8072a/human_resource_development_multiple_choice_questions_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa5d9ce-e337-4889-b6f1-fd2b8b1c0db1/mokulobizewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e78afc-8e9d-44ad-aadf-528c0c83af01/citra_3ds_emulator_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481aa827-4852-48da-929e-f437fb34e00b/lenovo_g50-45_80e3_battery.pdfIn 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_off000116d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D0 5464 bytes
SHA-256: 063cfbbb126a73f70808c45c7370e57084fd94a534282ff83495c44c523f0968
font_01_sfnt_off0001298f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298F 10808 bytes
SHA-256: a817d62a856c086c77bf8f44d1d195a28e389509aef1063078c7c3fd54da0b86