Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24e5a6c34eb57a1…

MALICIOUS

PDF

81.8 KB Created: 2021-05-20 21:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 61e5f9c64b39836ad4951e438a2f4a3d SHA-1: d15e5b04b2cc2903192769d8aad06ac90cc5e4b6 SHA-256: a24e5a6c34eb57a12ebb576d318549e4c6d9ac2c8453f32db608e462e107e2fe
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain keywords related to weight loss, suggesting a lure to a malicious site.

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://kuzutuzo.ru/strik?utm_term=how+to+lose+weight+by+lifting+weights+only PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451565/normal_6009858455df9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_601dc939b6db6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466662/normal_6045ca8185d20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424982/normal_5fc95e38c885b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_60369e9a7434c.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/naxozelozude/82814035393.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/jijiso.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/83115734653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2348a723-1cec-4280-86ac-fda6dd884e43/reluctant_fundamentalist_book_ending.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e23ed741-c5b0-40e9-bb34-183f6bb23713/2000_dodge_dakota_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e33af36e-5b1e-4548-b95d-342f32c6fa3a/best_banks_for_international_living.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86ac6310-98bd-4cf4-8b3e-0e5c6e006ecf/maxuxunivonafuvazi.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/59595857787.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/ariens_snowblower_parts_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/attila_total_war_religion_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd0a0e03-7bfd-45bc-9a08-a03d7a522a84/palifodedukevanagis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/918f0f6b-b843-4dc4-9735-2279c99af392/diablo_3_eternal_collection_switch_release_date.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_off0001006e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006E 5020 bytes
SHA-256: 94e789f137e6f8653e88bb7647eff90f25affbd0b0884f9b11aa02a563c70854
font_01_sfnt_off000111a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A2 11464 bytes
SHA-256: d7d94150c0dc07e77be622223b2c13b2fe5323e9c8a09f30f7f1cffb501e8439

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