Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d726c17ae82a4ac…

MALICIOUS

PDF

83.2 KB Created: 2021-05-30 00:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1e31aff00b9be2992e611a89fecdf636 SHA-1: 2f2826d94e7dd8ecd6af571f32cf63ab77ba07bc SHA-256: 3d726c17ae82a4ac603b30872b61a170ed1dc6d92bc74b70f10f96aecb8c8460
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a phishing or malware distribution site, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=how+to+set+wooden+mouse+guard+trap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500430/normal_5fd7967385f41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410030/normal_60107b05b57b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417537/normal_60191a11395bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490953/normal_601e88187dbdf.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/8d8767f1-7727-4411-bc58-f40cd243a927/american_society_for_quality_certification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3288f15-c101-4ba0-a1dd-cb64849ed9a0/gowugowasimapuvurakoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ca307a-ad09-4c0b-915a-7dab43f88e88/46129113715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76a95b5-545b-4ef0-94e9-c863792beeb1/loriwerinozejujodilimike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87523962-2721-4894-8f26-8cedca54282d/el_principito_pelicula_completa_en_espaol_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c5c26f-e93a-4dab-8110-8fcf2da50c8c/what_does_scientific_reasoning_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b03183-1501-48df-9a99-e6342a8ef62d/what_are_the_indentations_on_lower_back.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5736304c-916b-4d37-adcf-6c8bce17ddca/36436110863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10847e2d-fd39-4376-8345-1ce78e13b256/auto_clicker_minecraft_bedrock_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3952958e-5651-4763-83a2-048bd71db21d/docker_compose_version_2_3_difference.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61db1f5-5405-44bc-a21d-572efd5dd51e/hp_probook_650_audio_driver_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aa2166f-9cb6-4442-bdd3-a2b1c0ce9ddc/7800449912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d7c9667-c137-4ead-abb0-b93cbbd9dbc5/zigawumorodefoseroluk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48072f23-87dc-408e-a136-3c7bf2d3a126/63346039326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d02b523-3455-47eb-8fc9-a1834e6242d4/snow_like_ashes_synopsis.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_off0001012a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012A 5300 bytes
SHA-256: b9f85bd09d9dbd986077fa8f29784824ca437d10af33457763d2aeafbb963519
font_01_sfnt_off00011329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11329 14588 bytes
SHA-256: 38775c018d8d261e709110f592ee784375f5c3bb042330c63196472e24767fcf

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