Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f8edc5a330e3f77…

MALICIOUS

PDF

90.5 KB Created: 2020-12-21 04:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d6b084652f610e52004a7fd393cc3002 SHA-1: 9c971f02069763412a867d51e4c0ecb5c18e1bbc SHA-256: 8f8edc5a330e3f7727851b4e2bb2d74dd452f000f3664c88816aa5780efff733
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting it is used to redirect the user to a malicious site. The document's content, though heavily obfuscated, appears to be a lure related to 'apartment owners association deed format', which is a common tactic for phishing or malware delivery.

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/aws?utm_term=apartment+owners+association+deed+format PDF link annotation
    • https://bigififipajug.weebly.com/uploads/1/3/4/7/134709095/wovalubo.pdfIn PDF document text
    • https://kipunokazapalu.weebly.com/uploads/1/3/4/7/134774983/1943053.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484818/normal_5fdedc8a44379.pdfIn PDF document text
    • https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/kagovilewijebe_gavagoluvoza_juviximugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f974af759bc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5f8bbf0ec1543.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59b661e25426e12fdcfc/1606375863110/carburetor_shop_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d8c97c-024b-43a5-8c13-cd2a7daef819/adobe_illustrator_cs7_free_download_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aefd461-d571-4d8f-b6a0-be3902a246ca/voxubax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4011518e-fd2d-4a78-a00f-904704d7ea17/44021939666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6eebf61-54cb-407f-9992-a5af2219359b/11924420452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24cb0a74-5892-47ac-8abc-9bc1be45f250/mgs_in_xanax_bar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9036b97992eb55c1f46/t/5fc49202173fb5383b35b916/1606717954392/ace_family_catherine_pregnant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d7471c8-efe0-4c0e-ba16-96327e8ea89d/98402990246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2281547-f1c5-4e18-9357-12a6e0df0b32/comportamiento_del_consumidor_marketing_libro.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_off00012620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12620 5348 bytes
SHA-256: 11aeaac2e999d31828552bcbeb34efb6e813f4145b398e5b78e80b331d337d2e
font_01_sfnt_off0001384c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1384C 10672 bytes
SHA-256: 4b48a3656b18e78c2fad1d6b718f99a4ce874c3fc9036652d344dd0a0ae77ec1

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