Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ced3938d17640c…

MALICIOUS

PDF

79.9 KB Created: 2021-05-16 11:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f5eb880946fd122d2df90473b479fcf1 SHA-1: 268b046575cb0d8174b58b7b268c0ff7038ec61e SHA-256: c3ced3938d17640c1c00c3398518c5d3407c8c976796c2127bee24049087f182
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/strik?utm_term=spoon+river+electric+coop+canton+il PDF link annotation
    • http://baltika-trans.ru/types_of_vertical_axis_wind_turbineabu7z.pdfIn PDF document text
    • http://tekplafond.xyz/free_solfege_exercises1cfu9.pdfIn PDF document text
    • http://konolux.medianewsonline.com/93165442741.pdfIn PDF document text
    • http://nyvelsets.online/nitolenice0fj.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/maroo_of_the_winter_caves_chapter_13_summary.pdfIn PDF document text
    • http://cleaner360.shop/83954390393hzer3.pdfIn PDF document text
    • http://site-shop.xyz/43811617087srccf.pdfIn PDF document text
    • http://naturapple.space/tixolubijepakunemujapunalt994n.pdfIn PDF document text
    • http://netzamka.ru/68653742137jpx33.pdfIn PDF document text
    • http://luminar4-download.xyz/reposomutozeloweketovugzh.pdfIn PDF document text
    • http://tehnotop.store/303083015360fufk.pdfIn PDF document text
    • http://zobabikox.medianewsonline.com/ronunubafuze.pdfIn PDF document text
    • http://lunagogafoxoj.sportsontheweb.net/bureaucratie_weberienne.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dexadusoxeb.atwebpages.com/le_marxiste_de_marx_aron.pdfIn PDF document text
    • https://804b95bc-9ca4-448d-a094-5a8e1ff69a26.filesusr.com/ugd/99d1da_4e01f89935734914888146f67c77e4b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/49689a74-312a-4f74-b90f-f3ef72c3d1a6/play_the_song_power_of_love_by_huey_lewis.pdfIn PDF document text
    • https://36d3fe4d-ce77-4ecd-ae21-04b42370c250.filesusr.com/ugd/871c54_9d1ada4b221f43289b62dabb5fcdfb7e.pdf?index=trueIn PDF document text
    • http://lufopudizomuv.atwebpages.com/zareridaranivufalefolavet.pdfIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_e25b107b8d4c4d66bb7c8777ee5b569b.pdf?index=trueIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/dowipegokewojuxulodago.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/3d_in_autocad_importieren.pdfIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_d75f985457dc41b1ac3a5fbd88de9184.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa7218e-1879-45a5-abad-f2dcd814ebe6/what_is_naviance_training.pdfIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_245dd5c6b6ef4789868a1d3e4b283a9d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/706912c3-e33e-4153-b9fb-db2320a74628/donkey_kong_64_walkthrough_gloomy_galleon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00242fce-1414-4818-a011-73d22723ec4b/jaxogewebaxurikoregunemud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 4700 bytes
SHA-256: 7d065ed76d521f95776f452635750fb40b21ba788e760f5ba885828d17739651
font_01_sfnt_off0000ff6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6A 10724 bytes
SHA-256: d4edbaa210b6dd227fde35fc3e0a559f1fbd0e7fdab5eaedc81897ef44729106
font_02_sfnt_off000123d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378