Malicious PDF — malware analysis report

Static analysis result for SHA-256 601e6196cab16df6…

MALICIOUS

PDF

96.0 KB Created: 2021-04-08 02:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 99f5d469fea6e4d0f9b46649487ecf2f SHA-1: 3fdb59c33c93defe7d8475c463ca0ff19fc80845 SHA-256: 601e6196cab16df62a7eb46b6df359206461724004da483f3c1fb9174c1efd7e
66 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 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 0.9993

Heuristics 4

  • 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://bologen.ru/wix?keyword=go+math+pre+algebra+8th+grade+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374379/normal_605f86d9c6a89.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/iigj8gc/rukemavafi.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/pdf_arcadismo_no_brasil.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/JjgOwjj/seven_wonders_of_the_ancient_world_in_order.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/24343039147.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/dOgecTx/dota_2_invoker_guide_german.pdfIn PDF document text
    • http://serawuv.mygamesonline.org/49013441951.pdfIn PDF document text
    • http://gavolav.mywebcommunity.org/exercises_present_simple_affirmative_negative_interrogative.pdfIn PDF document text
    • http://ramedefinu.getenjoyment.net/zagoxopironojalipejep.pdfIn PDF document text
    • http://duwuzoruperiged.scienceontheweb.net/shankar_ias_environment_and_ecology_download.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/candlestick_chart_patterns.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/iiSPUAg/levumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481409/normal_6056aa03da511.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393361/normal_6005f702d132b.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/f98C7gf/butazino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477873/normal_6059d004d9964.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/campbell_ap_biology_9th_edition.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/175d3161-0ca4-47dd-8d49-2ba943e4ad27/ed_sheeran_over_the_castle_on_the_hill_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc05013-4786-4864-a146-96059e783f7a/2567442684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb3e3f1-da89-4f9f-851a-4ed5fb3855ae/how_to_check_call_history_panasonic.pdfIn PDF document text
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_850ac54122d54e7fbebd846a10b442d6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c93dff0-db6d-49ae-b0ed-65cc84ae61a9/how_to_treat_anxiety_cbt.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_4b88177c419b47cba859100a7501ddc2.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_off000136a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A4 5832 bytes
SHA-256: 24d4ce7dbf9449276e1822ce6230c4f71b2dfef50341f5fa140517fb8b2cf8ff
font_01_sfnt_off00014a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A53 11752 bytes
SHA-256: eec196712f620309a2584aeadcd945946c6b2e9cc7c6b1b1bdfb8f02a3b961cd

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