Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ccf3299fc3aab6…

MALICIOUS

PDF

111.2 KB Created: 2021-03-18 17:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 43492dc04430b0e4ff4454c073c6c797 SHA-1: abd1107473d21c540967eef8b0dddb80bc582636 SHA-256: 40ccf3299fc3aab6085154d9316015d7cba71db5b95cb3fb2732df8a5e7f9eb9
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be related to technical documents, suggesting a lure to trick users into visiting the malicious link.

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://pelibifir.ru/award?keyword=bjt+differential+amplifier+solved+problems+pdf PDF link annotation
    • http://gajonedorebuko.mywebcommunity.org/sociolinguistics_theoretical_debates.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_605070ec3f85b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414167/normal_60162a9ca1f6d.pdfIn PDF document text
    • http://tegubija.mypressonline.com/catalogo_avon_campaa_3_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483610/normal_60004e21ccfb2.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://uploads.strikinglycdn.com/files/2c050a18-fef3-41e4-b6dc-f74ef2137332/ms_access_2007_tutorial_free_download_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8677f2f4-8a25-4097-bd31-527384e85844/47754900449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae12837c-d503-4cdf-92c3-be02bbad40b1/how_much_does_motorcycle_service_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/67080641054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30e0927-f933-4d2c-bac4-1e31f375cdbe/21709375405.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/vadevipug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6703778a-8937-4cc3-ad49-3d0629083df8/rifulijaxajuluti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/856cbd3d-0652-425a-8afe-c74e542c1bfc/22106634723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e508bb47-06d6-4a49-901f-d355005ef6c4/lenovo_ix2_firmware_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d702008-4b79-4ce1-bf74-a4acd762c6df/guns_germs_and_steel_documentary_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b9c048-6b60-4506-9442-5fe12864612d/movogofapexav.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/46015967177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90bec2a4-aca2-47f0-ac7a-6a264d45d0d1/best_battletech_mods.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/pefitamozesox.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/xifiradidogurevonuka.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000166cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166CC 5300 bytes
SHA-256: 324af6c64c7b1550ba7120145a2f83472185dc4d727d9326cca94428729e807f
font_01_sfnt_off000178b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178B2 11768 bytes
SHA-256: adc7f337f3ed027a25b0f9d51692d1d6caa2f8c462a08dc7fb35d9ccdba68b21
font_02_sfnt_off0001a0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0C4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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