Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad80445411b9bde8…

MALICIOUS

PDF

79.6 KB Created: 2021-03-23 00:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9824f61f60db9e1b558c5082ab2783cc SHA-1: 55b3eba769fc6ec70d55229dff5c9a99fcfc7d93 SHA-256: ad80445411b9bde8d31abd84730425dd7fa4bb0e97f88274bf51040b5ab1aa1f
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious URL, which is likely a lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to the embedded URI, suggesting a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/award?keyword=probability+and+statistics+1+pdf+download
    • https://gijopufiri.weebly.com/uploads/1/3/1/3/131384250/wefarej-xipogotazise.pdf
    • https://dijuwinepogiw.weebly.com/uploads/1/3/0/7/130738679/e598a1.pdf
    • https://varudigenaka.weebly.com/uploads/1/3/4/5/134597471/zezunute.pdf
    • https://kesobimagebow.weebly.com/uploads/1/3/5/9/135978915/tesetexapokoziv.pdf
    • https://minikugonon.weebly.com/uploads/1/3/4/5/134500064/5084483.pdf
    • http://ppl-nutrshopfit.website/acceptance_criteria_scrum_template461hh.pdf
    • http://tabikola.online/ginumiduruxoruvo4poij.pdf
    • http://neojust.ru/rci_2990_manual5sd7n.pdf
    • http://prolac.ru/queen_s_gambit_declined_move_by_movemv7hw.pdf
    • https://cdn-cms.f-static.net/uploads/4412591/normal_6023d733a651f.pdf
    • https://cdn-cms.f-static.net/uploads/4481157/normal_6031de1e7620b.pdf
    • https://cdn-cms.f-static.net/uploads/4367940/normal_60421be0ea239.pdf
    • https://cdn-cms.f-static.net/uploads/4457843/normal_60542f4ad54f2.pdf
    • https://raxopukefafifi.weebly.com/uploads/1/3/2/6/132695755/zanet-kedijak-vasugukem-vipefonujeni.pdf
    • https://xazalonabi.weebly.com/uploads/1/3/6/0/136086847/soranunino.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/nolarifaforuxop/amazon_stock_historical_performance.pdf
    • https://uploads.strikinglycdn.com/files/b117a01b-2a6b-4574-a40a-f30a09e1f175/how_do_you_remove_a_whirlpool_freezer_drawer.pdf
    • https://uploads.strikinglycdn.com/files/8a8a6cc0-2f5b-4138-b3fd-c5447a8024c3/cbt_workbook_for_depression.pdf
    • https://s3.amazonaws.com/tokudapele/wwe_raw_results_live_bleacher_report.pdf
    • https://uploads.strikinglycdn.com/files/0920fb30-3374-4bff-90b1-17cdb0266ec8/dajivorogigowanale.pdf
    • https://uploads.strikinglycdn.com/files/410a0ea2-1a6f-4d17-8c20-37244ad3d759/hoover_max_extract_77_multi-surface_pro_fh50240_reviews.pdf
    • https://s3.amazonaws.com/buwosevax/wimibalarizuwip.pdf
    • https://s3.amazonaws.com/vebisop/jumipogej.pdf
    • https://uploads.strikinglycdn.com/files/1583e755-f7b3-473a-b5af-6aa7122161e9/how_to_clean_waring_pro_deep_fryer.pdf
    • https://s3.amazonaws.com/taturi/kifanologakab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebed.bin
48360a0c98650a1b7eabcf6589db8cb8ba069697650d9086f799470ce23cd959		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 5204 bytes
font_01_sfnt_off0000fdb4.bin
523b550f5ff59b13538bd50d6f20f3974fcfdb5cb480533d00695e2351c4e234		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB4 10784 bytes
font_02_sfnt_off0001229d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1229D 4324 bytes

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