Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94e00054ebcba85…

MALICIOUS

PDF

78.7 KB Created: 2021-03-27 19:58:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cb3c9cd36eb19cbb22c2c5f5ff575ed3 SHA-1: b03c2f3e7baa6a74bba4a4ba3eae453368acd2a9 SHA-256: d94e00054ebcba85b705d23789f4ef4ac840e449b5d77839a097772eaaa55243
156 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The PDF contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, further supporting the malicious intent.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/award?keyword=ocr+from+pdf+to+word PDF link annotation
    • http://sputnews.com/15776168412iglvd.pdfIn PDF document text
    • http://beliyden.xyz/air_fronts_worksheet_answer_keypmcmv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5fe8e3d12d823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445868/normal_60517d6ca8eb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412161/normal_5ff4493b5def8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/78600962877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/128f4814-b04b-4f70-91e0-7d52353810d1/galaxy_theatres_cannery.pdfIn PDF document text
    • https://d85b1738-a471-4043-b59e-116b2bb794a3.filesusr.com/ugd/97927e_3c4c4e02920041a0825c6ce0755782f3.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_010ac58a08ee4df5b8c39e5558acb58b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/bogewapodaroko.pdfIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_32fbaee0426b4dec8a015d1f20c887d1.pdf?index=trueIn PDF document text
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_fe186496bd544e52b3c24002ecb67a3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woberiz/avitaminosis_b.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/13946631194.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/samsung_rf268abrs_control_board.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/que_son_movimientos_locomotores_en_educacion_fisica.pdfIn PDF document text
    • https://fecd0c08-032d-4b8b-b26c-6108aca7a00f.filesusr.com/ugd/a87c8b_89ea52739b224280b8490f21242d6c54.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kigavanus/civ_6_gathering_storm_leaders_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/885f8d46-3144-463a-b5b4-ea65aa7bcfca/what_kind_of_math_is_used_in_aerospace_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/pneumonia_pada_orang_dewasa.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_off0000e97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97C 5000 bytes
SHA-256: c80dfda39991289c85b9373842f1b6844c844586988c92acba99f67ffac067a7
font_01_sfnt_off0000fa80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA80 15976 bytes
SHA-256: d0ae732b5cf1586173c64a9e81f1bd07c707348e9676628f644a47fb73c8e5f8

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