Malicious PDF — malware analysis report

Static analysis result for SHA-256 8822f7bba1dc1774…

MALICIOUS

PDF

107.6 KB Created: 2021-03-21 03:36:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18706bd7adf74de230c6cf14be47d38b SHA-1: 786dd877a69d5517b949b8e2f5735a4fec6f087d SHA-256: 8822f7bba1dc1774867b35a297c3e6b1ccd3296294d3df181c960e16054aae01
196 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The heuristics indicate it contains a link farm and an advance-fee scam lure, suggesting the document's purpose is to trick users into believing they have won a prize or are owed money, which requires a fee for delivery. The embedded URLs likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://seumenha.ru/wix?keyword=electoral+college+compromise+definition+ap+gov
    • https://visopitolunew.weebly.com/uploads/1/3/1/4/131483219/xumupapefimis-riwuv.pdf
    • https://fiwarurebel.weebly.com/uploads/1/3/2/8/132814972/a68ceff.pdf
    • http://zurufarovosu.iblogger.org/ap_biology_textbook_campbell_7th_edition.pdf
    • http://copyright-notice-ig.com/big_fish_casino_chips_hackmb5f9.pdf
    • https://zibataluguxomi.weebly.com/uploads/1/3/1/3/131382491/gobavupej.pdf
    • http://pesale.pro/instagram_video_er_online_mp464vtj.pdf
    • https://neseriduro.weebly.com/uploads/1/3/4/8/134851425/4512485.pdf
    • https://nefirekemoziwep.weebly.com/uploads/1/3/4/3/134332842/c5594f.pdf
    • https://vegonivi.weebly.com/uploads/1/3/5/9/135986737/5c1ec66a967f7d.pdf
    • http://wovolutoxali.iblogger.org/capitalismo_perifrico.pdf
    • http://lozajakar.iblogger.org/sefajeki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6b232feb-5aab-4191-a7ca-bd2ad7f50af6/how_to_change_water_filter_in_keurig_2.0_k200_plus.pdf
    • http://pegalisijeg.epizy.com/49733285308.pdf
    • https://uploads.strikinglycdn.com/files/b42ae77a-8478-426b-9d53-deb2282d7a05/defining_deviancy_down_wiki.pdf
    • https://uploads.strikinglycdn.com/files/5e098e57-bea5-4bf9-ac32-be954c351ec9/great_writing_fifth_edition_answer_key.pdf
    • http://kubimuze.rf.gd/wovelejot.pdf
    • http://zumaruzafomadik.rf.gd/izotope_insight_download.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_off00016537.bin
780becef5ad75f0e7a20230256d70a36a8615063d1673b62ec6ece373bf80ebb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16537 5492 bytes
font_01_sfnt_off000177e0.bin
33d5a3518fc04705b75b5b40199aae6eca71410a2e8056a78d6203559e0b5d1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x177E0 12156 bytes

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