Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01eedf96435ce3e…

MALICIOUS

PDF

75.1 KB Created: 2021-04-05 13:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f98e4c493f3bffe92518a4814882745c SHA-1: 75334bb5659ced68700d4cb5f3741fe7a62a1028 SHA-256: e01eedf96435ce3e10b882bbb2d1d07e4aae7cbcbcb7197afa7a964df7b291e9
156 Risk Score

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 0.9997

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://midufefew.ru/award?keyword=ukulele+fingerpicking+patterns+pdf PDF link annotation
    • https://kumobavogi.weebly.com/uploads/1/3/2/3/132303339/0eb1736ec4a35.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/cc121e8652.pdfIn PDF document text
    • https://gatodagimisosog.weebly.com/uploads/1/3/1/3/131379801/6105468.pdfIn PDF document text
    • https://jerofewu.weebly.com/uploads/1/3/4/3/134369167/mifugaliva.pdfIn PDF document text
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/6231660.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_3401b93670f740a4a3490d8e9f5830c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tarajix/kelogusojaliwa.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/dipixabukoninexuvog.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/nuvukemajewemotavamela.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/nationalism_and_patriotism_of_filipino.pdfIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_0454dee618fb4e4580879537649645ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/example_business_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/akhiyon_se_goli_maare_song_ming.pdfIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_fc9148eeff5841128c1a224680a42238.pdf?index=trueIn PDF document text
    • https://9610c43f-1b2a-4a8a-b660-75aaf3908198.filesusr.com/ugd/286fb8_e7ec3db5f75341668b4a8a307ef50436.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/como_hacer_un_panel_solar_casero_para_maqueta.pdfIn PDF document text
    • https://04fc2a56-3ca8-4b90-bfe8-b05f9e7ed3d8.filesusr.com/ugd/51e9d0_99fac2657947494f9b07276d5d31fb5e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/wesoved.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/6904508750.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/frightful_s_mountain_chapter_2.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_off0000e69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69B 5380 bytes
SHA-256: 5b0a745e1534fc701554d689f4b7bda00ac0c4cee62e0439ecf4e5245ce399d9
font_01_sfnt_off0000f900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF900 10732 bytes
SHA-256: eeec642e958feceeda5ad330c56f850276aa6c677cac639ad94a35a7736200e2

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