Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebae61c6b73f280…

MALICIOUS

PDF

82.4 KB Created: 2021-03-18 20:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 11a9f4259457830b05e3be5d31038dbd SHA-1: 9debe5d3dd46b4d86efd7cf92841bf7e4c16a82d SHA-256: 7ebae61c6b73f280c7fa2f321727107b2f07b709c2b8b64dbc7fedb201d71b60
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/award?keyword=asme+section+viii+pressure+vessels+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495055/normal_5ff0e8037044d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476272/normal_60362ceaa9bd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409409/normal_600173c9c0759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375699/normal_6023d480559a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478393/normal_5fdc45e0f19c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://karifopiti.epizy.com/74361581517.pdfIn PDF document text
    • http://residarifuwus.rf.gd/gamuzuporodujuvegerub.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/neptune_t-10_water_meter_reading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1261d1-0f04-40d6-9139-c3cb4b5dd54c/rovifaxezudenetavojamakan.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/best_video_player_for_ubuntu.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/inner_product_bilinear_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/dafipafigikamewivot.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_4f186c84d39f41e3972df4c78b3d4455.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af3b802-d19a-40c8-b080-f1a090d522e1/verbos_para_objetivos_taxonomia_de_bloom.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/32713592002.pdfIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_2dab4a7b78a04bf8b4b35a32537c39f6.pdf?index=trueIn PDF document text
    • http://suvapik.epizy.com/jeep_wrangler_frame_repair_shop_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ef578f-aa75-473c-acda-95321c39d46b/miessler_and_tarr_inorganic_chemistry_solutions.pdfIn PDF document text
    • http://supoxurenabix.epizy.com/onkyo_tx_nr515_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb19975-1ac2-4a32-97e8-a2501034a46b/60464925211.pdfIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_d03b56856fc54e4d9c289d5d3f1fa9fc.pdf?index=trueIn 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_off000104dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DD 5140 bytes
SHA-256: 955c1f8dd9455fd099ae782ede71f60ab0ada3f26ab61006c4c883f81e78227f
font_01_sfnt_off00011651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11651 11124 bytes
SHA-256: aeb08698d06e60c70dbf75695f281d086db353efad60a2a77698668fb3fce828

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