Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7cf6f14ac03220f…

MALICIOUS

PDF

42.0 KB Created: 2020-11-09 06:01:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b9f464d7989836595bf8a15542582ee7 SHA-1: fbb673dc19404cf4432e7802c78291f518e2c622 SHA-256: b7cf6f14ac03220f8c963abe4c425915e0207597bbe741f285f038b0dbb26d91
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though heavily obfuscated, contains a reference to 'Ca brake and light adjustment certificate' and the malicious URL, suggesting a lure to trick the user into clicking the link. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?keyword=ca+brake+and+light+adjustment+certificate In 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/fdcdab8c-d503-47b4-9332-4c8de6d6d344/lam_heo_quay_da_don_vanh_khuyen_le_air_fryer.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/il_barbiere_di_siviglia_rossini.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/death_march_light_novel_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/bioethanol_production_from_lignocellulosic_biomass.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/vifepalenarasazoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/juwowilakukunepimuji.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/honey_smacks_cereal_bear.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4582e65e-dd99-4d44-95f5-4649ad3fef74/97928883869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/920ac783-a5ac-4fd2-ad1d-f201d01c0c89/wicklow_mountains_national_park_weather.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e93a23-9f2e-4223-9c37-2b97c14f42e8/7866950152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af4cbeb3-1fea-4463-8039-1a2414332dfd/identifying_plagiarism_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/john_wooden_7_point_creed_poster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37bad5bb-0625-4415-b211-06d818229712/gugixuvepe.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/andy_warhol_self_portrait_1964.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/83853435803.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_off000064ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AD 5620 bytes
SHA-256: e2950a388a76fed86f0c9c05d970caf9893e8602f097d89958fe52a44770f628
font_01_sfnt_off000077a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A4 10324 bytes
SHA-256: d6b48e40a0a2b46123819d38eba350895e4e7305b55db835c5ab230f4f1081d7

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