Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7ed84fe7ba667e…

MALICIOUS

PDF

74.1 KB Created: 2021-03-17 14:19:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 82cccf8932e83ad7c2a2c901e883cac1 SHA-1: 5bf182192de4e373b9539c6b82fb6974546df29a SHA-256: 9f7ed84fe7ba667e92323976008c592aae11b80607097b472d40e76331867d38
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=nervous+system+flow+chart+answers PDF link annotation
    • https://cdn.sqhk.co/dubikureta/djiicjf/55396871712.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/d664023.pdfIn PDF document text
    • https://mixifomako.weebly.com/uploads/1/3/1/1/131164472/puxebolegu_kisel.pdfIn PDF document text
    • https://memarexegota.weebly.com/uploads/1/3/4/3/134366516/ximemedemeturitaget.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/ib1gdjj/donde_cruza_el_tropico_de_cancer_en_mexico.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/mosirivavarulef_vawakirekekumag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413976/normal_5fd08d2191189.pdfIn PDF document text
    • http://nugekurobeju.iblogger.org/lake_guntersville_fishing_report_facebook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481695/normal_600c1b04262b4.pdfIn PDF document text
    • https://pawirijox.weebly.com/uploads/1/3/4/7/134701745/735129.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kavolimuteso.epizy.com/55120199309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95909957-40fb-4f9f-9702-7dfd1d590a61/how_much_is_a_2010_camaro_payment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f0c961d-198f-40ac-85e7-f12fb43a7f5e/pabalujozoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f67be4-477b-49a4-a1e1-abc66e35c677/how_much_does_a_10_000_watt_generac_generator_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e22818a-3520-4acc-bc57-18b1613ab287/libebalofomuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1370b601-c4d6-41b9-8c7c-8e0e81399408/61553867081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ffbcc7-3b20-4a1e-abc7-626a0c522929/sbs_2011_standard_console_has_stopped_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1484015e-5d36-44fa-b9f3-f5d631726048/kupopuk.pdfIn PDF document text
    • http://gajutovowitexij.rf.gd/govexibiwolif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a964fc4a-c298-46c8-be99-7059c518e392/what_does_technical_drawing_meaning.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_off0000e6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B8 5344 bytes
SHA-256: c27420ca7d647c21d0132b3b666075f1acd6aa414a515b8bd6bdef00b7ef00e0
font_01_sfnt_off0000f8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 10036 bytes
SHA-256: e27db55646ff857f32066eed8adb27e366a0f3923a6f565bc8a3a59a60e0beab

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