Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a714279480ce3de…

MALICIOUS

PDF

268.0 KB Created: 2021-04-06 06:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01c711ae4ae1cd5b62b92ee7da67d19e SHA-1: 4fe6e1c44d05f17b40ae1a7018eda716e0447eaf SHA-256: 7a714279480ce3de4be1d130c2e870f88eddff160b2cd10ac1374471facdacc0
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains embedded URLs, one of which is associated with a known benign domain but others are unknown or potentially malicious, suggesting a phishing or credential harvesting attempt. The document body text is heavily obfuscated and unreadable, but the presence of embedded URLs and the overall detection profile point towards a malicious document designed to trick users into navigating to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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/4454301/normal_6055908661003.pdf In PDF document text
    • https://padikolejak.weebly.com/uploads/1/3/4/0/134042397/2369984.pdfIn PDF document text
    • https://fivitilanafime.weebly.com/uploads/1/3/5/3/135395402/2868622.pdfIn PDF document text
    • https://varigero.weebly.com/uploads/1/3/4/4/134443598/fezabixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375705/normal_6062bac7bdd2e.pdfIn PDF document text
    • https://vukuxonujifated.weebly.com/uploads/1/3/1/1/131164545/1038389.pdfIn PDF document text
    • https://fudexevanege.weebly.com/uploads/1/3/0/8/130814713/guvodifata.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_6032fca77c2b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393356/normal_6057ea52403a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/vAIYpVcV8Aw/wb?keyword=migliori%20incantesimi%20mago%20d&d%203.5PDF link annotation
    • https://s3.amazonaws.com/jedobufudajewu/63199761069.pdfIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_3b12f8cd970b42f88d59eed7ba852cd0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/womirofop/mckinsey_diversity_report_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9a5b7ce-3d11-4f89-9765-7146b4a7a5e1/35890684324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/337e9831-db4c-47b1-b85f-e8c415c9a6b4/silagamukalimabevan.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/fawoguvolanevowidadi.pdfIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_6445e0e9a9a045eeae386f3c58a9bc77.pdf?index=trueIn PDF document text
    • https://23fe9111-5aa3-4288-b7a4-a84c242bb647.filesusr.com/ugd/d35b85_df0edb000ea74714acfd8336a5a7551a.pdf?index=trueIn 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_off0003e5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E5AF 5264 bytes
SHA-256: eb8bd9882de7ca37e42db1a7b69c89df4520fdc4be51dbd7281950b84be6b150
font_01_sfnt_off0003f78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F78C 12564 bytes
SHA-256: 02a683ad456ac4eb52943476d1720274e681ca1ccec4da1259a656a02a26ec49

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