Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f44363908e76611…

MALICIOUS

PDF

78.1 KB Created: 2020-12-16 19:17:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 14b35bd1ca65a4c7a307a5191de4cf7a SHA-1: 91920b016032004fd751465191e9697fe5dc370f SHA-256: 8f44363908e766119be8fe0e6df0ffb185b0f4e73457033297a6a6f68764f641
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffnew.ru/aws?utm_term=naruto+blazing+apk+mod+hokage PDF link annotation
    • https://lutenidu.weebly.com/uploads/1/3/4/3/134398581/7e984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_5fab0f0222b36.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5c8f7b-0876-4777-b86c-3e34c4cd69d5/xeserotagajuwotifagab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc170e692c50b1a1e7b565d/t/5fc4675e18e72e5fdb655304/1606707038447/53917627072.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/41615760744.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/mewivizuferonixe.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/78054551159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/088c6bc4-bf1e-4a48-9c81-5c6d249f8da3/28010584322.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1571bc30a162e0c558f21/t/5fc7f679bd4f1f2025269a6d/1606940281586/81187062996.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/pe_foam_sheet_buy_online.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/42549583846.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1015360f2895dc1e86a3c/t/5fc75baf7995075abde2d28b/1606900658296/ates_ve_su_3_buz_devri_oyun_kolu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78612f2297e36a9ff05b6/t/5fd20a5fb91f50015ef3a61f/1607600735343/map_markers_minecraft_pe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10D 5416 bytes
SHA-256: f9451ad9f8a03b86028d37d9ee5671a3db66a8e1d9f31524b55b9c9605642fad
font_01_sfnt_off0000e351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE351 1936 bytes
SHA-256: 21a7146106e2ad29a4dcc6aa55cee169416400570e2b3d493b6d071cb256f2f3
font_02_sfnt_off0000ec93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 12176 bytes
SHA-256: 30011f2d8170c0ed9f1ae9c15401486105090ef8408f366fd53a7ddc3a6503e9
font_03_sfnt_off000114e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E1 16708 bytes
SHA-256: 7ff8585f0452229cf00b15a46bd75f5b2cf9abf22a9fa8d7aa6566e1f297882a

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