Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c4b115b637f0b1…

MALICIOUS

PDF

72.6 KB Created: 2020-12-17 06:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 88501fb2c6f99af25592510d10f68ee0 SHA-1: 9eac96124dbc5b650c77e44b3d6bcf85fd6ad010 SHA-256: 58c4b115b637f0b1cb37f355a36fdb60a755b469933c2a69f5db58c410c38ce0
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution site. The document body is heavily obfuscated, suggesting an attempt to hide its true purpose, but the presence of the external URI is a strong indicator of a phishing attack.

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://trafffi.ru/123?utm_term=cradle+to+cradle+architecture+projects PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5fc1ba48189f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5fc81393dec5b.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://static1.squarespace.com/static/5fc14701c6229360ecaf89c9/t/5fc4b4383485235c865af754/1606726712638/gonimozolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d9ab25-5c74-40ce-89c2-dd5bd8d37f16/82144591031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda131e0-ff23-4227-b366-817959285429/29457845203.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18357bda9c57a97c28a1b/t/5fc2f531cb3e0f5771b2178b/1606612275097/duforemot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9db51a09-b57a-442a-b514-b51b5268dd43/85169632815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e3fe20-a399-4689-947e-927fd85375a6/2852096167.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/scott_mccloud_understanding_comics_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab19801-8cab-4ee5-80e3-880d60481714/xedoxepufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e318df5-8842-4411-bd79-6907abdfe19b/luxikenama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9aa6147-8a62-408e-af4e-130e3ca7d349/ap_bio_lab_four_plant_pigments_and_photosynthesis_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31640728-457e-4d25-b4a5-0c5939ce264a/4644286256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c207e053-807d-4655-b0e2-43848e0fc511/ohio_state_calendar.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_off0000d06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06D 5036 bytes
SHA-256: 0e6e61d6fe852630584567af5b028b100f08218b9e2df803ed3ee0342d160620
font_01_sfnt_off0000e1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A3 11436 bytes
SHA-256: 2ff9df23b0fccdc232a6a20839edfff21dd1a9dce831c261f6e75c87d0b79ac5
font_02_sfnt_off0001077f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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