Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d95b175a846e16…

MALICIOUS

PDF

77.5 KB Created: 2021-03-23 21:55:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4bf4318d60bd30e0169d010672773e5e SHA-1: 1eb01e6d59c8a9b981b72b9169384f1690995b4b SHA-256: b6d95b175a846e1607f97c1a60252f0b680e6a8176e9055850819fde3385a04a
96 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 0.9992

Heuristics 4

  • 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://ponafet.ru/strik?utm_term=the+alienist+season+1+episode+synopsis PDF link annotation
    • http://mavigawika.scienceontheweb.net/5836971767.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/bissell_powerforce_compact_turbo_2690_belt.pdfIn PDF document text
    • https://xulazipilo.weebly.com/uploads/1/3/5/9/135958699/wuxutoba_novufatajekoxis_bejuvurinedeviw_waripibeji.pdfIn PDF document text
    • http://gafabotipunofu.mywebcommunity.org/tapijavajevise.pdfIn PDF document text
    • http://sekujirimabasas.getenjoyment.net/how_much_does_an_indian_roadmaster_cost.pdfIn PDF document text
    • https://tadeliganunuzax.weebly.com/uploads/1/3/0/9/130969808/6337012.pdfIn PDF document text
    • https://cdn.sqhk.co/bezugisav/MhdEgj6/70346337.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/4959721.pdfIn PDF document text
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/leruzogekuvuz.pdfIn PDF document text
    • https://cdn.sqhk.co/sanojuxako/YhiigAU/letadope.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/blackmagic_atem_television_studio_pro_hd_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/barangay_tax_ordinance.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/32244679632.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/7280615344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c2c47fe-93ab-436f-bc60-493741f479a5/how_much_does_aircraft_maintenance_engineer_make.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/48978595296.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/19768099655.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/java_1._7_offline_oracle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446d735e-2673-4e85-aee3-394509511bec/porter_cable_scroll_saw_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f6e8ab-ac04-4973-9f81-13e34d7867dc/61519649887.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/counter_strike_game_free_uptodown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7daa8cd-a140-4984-9578-7ed990af0d40/velagem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05bd4cf7-7b3d-4748-a491-71c3010798de/85339864404.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 5056 bytes
SHA-256: 72203659d1d228b336d0ea3f9776323bc8c87a9ed406f7395fcbb26205fd8362
font_01_sfnt_off000101a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A2 11220 bytes
SHA-256: 93d72c26eeb54644cc90308bea847fb5e5730bd1060ad2176720125626845dbd

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