Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9dcaedb95ead60f…

MALICIOUS

PDF

84.3 KB Created: 2020-11-11 11:18:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5065516fc9b8ea847f0b062da7d86c83 SHA-1: 50fc9fd6926b1be94855622e280c83cbcd9dbbdd SHA-256: d9dcaedb95ead60f6b6c84b79d40d2fbce2deba1058cfc9161742e26ba023401
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous external links, with one pointing to 'trafffe.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, implies a lure related to 'Moviebox ios 2019', aligning with the advance-fee scam heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/123?keyword=moviebox+ios+2019
    • https://pewovorawegoxuv.weebly.com/uploads/1/3/4/3/134351704/maxuvexezopoxuzi.pdf
    • https://cdn-cms.f-static.net/uploads/4427103/normal_5fa1ab5b06922.pdf
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5fa045ac94020.pdf
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5faafee7a135d.pdf
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f87263b1c4d8.pdf
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f89cd480fd85.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6738b81e-6179-4975-be6c-cda0411e25a4/35878199939.pdf
    • https://s3.amazonaws.com/zetare/60834615580.pdf
    • https://s3.amazonaws.com/jovekus/moorish_american_prayers_to_allah.pdf
    • https://s3.amazonaws.com/xumakomowi/71666878382.pdf
    • https://s3.amazonaws.com/pujirageg/unknown_mod_menu_gta.pdf
    • https://s3.amazonaws.com/wokesabisevo/hp_15-f272wm_reviews.pdf
    • https://s3.amazonaws.com/felasorarabipis/vikumofabotugelub.pdf
    • https://uploads.strikinglycdn.com/files/3d85b1d4-88f5-49c2-8016-e5f00c494907/global_minosharp_knife_sharpening_guide_rails.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c38.bin
ed4f000f4e7b971b6fc494349759a9b228397380a3f9bcdcf1da974a14d49891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C38 5096 bytes
font_01_sfnt_off00011dbc.bin
bb10dab5c8415fbcc23788bda61f87c677f8bb0b445fd3997faf344b1c05d6d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBC 11324 bytes

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