Malicious PDF — malware analysis report

Static analysis result for SHA-256 df45d89fd08c03e7…

MALICIOUS

PDF

77.0 KB Created: 2020-12-21 11:55:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 324fe7d1606e172390275c0031612f0d SHA-1: 7975393fd7197e4ffa8105a11bd61919e73b5f02 SHA-256: df45d89fd08c03e70e39bdf529799612ccb763e7630b1f687bc4e5007322c827
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and phishing-related. It contains embedded external links, with one prominent URL pointing to 'traffset.ru', suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/strik?utm_term=car+art+wallpaper+hd+1080p+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394061/normal_5f930381017c5.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/5410436.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449788/normal_5fdf5a9b4e620.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/2ae3f057-56a7-4ad4-bc95-08cb2ec77c1a/bttv_emotes_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12928af1-8960-40a3-8b98-6e5013c35295/red_sparrow_streaming_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80cedf2b-74e3-4cc8-96ce-cf49a97d078e/18012147077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3730f8ff-8c14-465e-b147-bef36749b063/spongebob_lights_camera_pants_gba_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c096c367-ffab-47aa-842e-eee451f1c915/pekim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bcb0b1f-9602-40a8-8263-4732c147defb/resabuditolura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/284c2a1b-b32f-462c-b4e1-baea2cf59e79/lander_j.p._28201429_r_for_everyone._advanced_analytics_and_graphics._pearson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b99e353-546a-4872-be04-0ac6a01d83c4/tepowibaroropipivu.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/potassium_chloride_chemical_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd39c85-c23a-4e48-8bbd-14d586624959/9461683052.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_off0000cd78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD78 10796 bytes
SHA-256: 6b6a427a1ba30bd831654709a4a0e0b923c48aa45453b46c301ec88612d5d99b
font_01_sfnt_off0000f059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF059 5336 bytes
SHA-256: eef4ce0dd467fdbd339a9fe10ecb73297737410a94125796257092d5e67b9f05
font_02_sfnt_off0001028f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028F 10584 bytes
SHA-256: a4a05389d8a59b8a9331da423439154df6a49e8f847973de0b98c467c1f176ac

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