Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c38ce734ca75b3…

MALICIOUS

PDF

93.6 KB Created: 2021-05-28 07:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 017e0e9ad4daae7adca9366c0398ef82 SHA-1: 8aa9abb966a8614bfddf59aff804636988d4bf44 SHA-256: 46c38ce734ca75b34bbf12cba5748d52a9e5c620d594bdb44ace1001b0a65451
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating it likely exploits PDF vulnerabilities. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites or download further payloads. The document body, though heavily obfuscated, contains metadata related to a PDF document, reinforcing its nature as a potential lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cdn-cms.f-static.net/uploads/4382976/normal_604867bbc725b.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388427/normal_6013a0392c660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_603cc0ed80d50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367019/normal_5ff0e94f86436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_60697b6567da4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454678/normal_602d5b0d4c8be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389603/normal_5ff5a6cc4fecf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425919/normal_6067f5f29b27c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459055/normal_603be08b6677f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422180/normal_606c661a75352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477400/normal_605a5621ef0e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365660/normal_5fcefff3c24af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451212/normal_605b51c594d38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393488/normal_5fdbecea94609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_6028304286b4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493888/normal_600bd27e5de51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470696/normal_6012248126a42.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
    • http://feedproxy.google.com/~r/wb/ENAH/~3/3IgsHNHpEfs/wb?keyword=bare%20bones%20a%20survey%20of%20forensic%20anthropology%20second%20edition%20pdfPDF link annotation
    • https://uploads.strikinglycdn.com/files/4d2850f4-16aa-4d88-ae06-d36b94382650/kadujekajobelupuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a7a558-f2c5-4b76-9e2f-b3b981e52685/the_art_of_raising_a_puppy_audiobook_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21583979-3d22-4bb4-b926-3d1f14f355dc/5e_crit_damage.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_off0001219e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219E 5652 bytes
SHA-256: 2675d7f48e9980101dff1abf62e3ad54b68c504838d3df28f740a8184a3a329e
font_01_sfnt_off000134d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D7 10980 bytes
SHA-256: b43857f96c6ff45e1243b3ee4ec275fbc90fd1ef63f70b462eb993f34f4cae79
font_02_sfnt_off00015a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A50 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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