Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc3a45dbced0ecd…

MALICIOUS

PDF

193.6 KB Created: 2021-03-16 17:58:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 028131e87577b3598851fac4468f5150 SHA-1: 3a814655a27f5b85bc92287d7788951dcd83e683 SHA-256: ccc3a45dbced0ecdb7121bad6bd88a01b65adab40928e9544b7f9573dac3d8a9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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 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://maypoin.ru/award?keyword=understanding+github+pdf PDF link annotation
    • http://rivozuzeno.mywebcommunity.org/36062055830.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/dan_brown_inferno_final.pdfIn PDF document text
    • https://peturenu.weebly.com/uploads/1/3/4/4/134401199/24253d650d3.pdfIn PDF document text
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/nizupak_pajotasijale_juzipipuluzimav.pdfIn PDF document text
    • http://storergoods.site/dias_festivos_de_marzo_2020_mexicokoisy.pdfIn PDF document text
    • http://cabinetsop.xyz/where_does_totin_chip_badge_go_on_uniformw9fb4.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/fupuxepizutu.pdfIn PDF document text
    • https://maselevajaf.weebly.com/uploads/1/3/1/3/131398143/4656475.pdfIn PDF document text
    • http://chambreop.xyz/rational_functions_worksheets_with_answers5amq0.pdfIn PDF document text
    • http://proita.space/90853350725tt86w.pdfIn PDF document text
    • http://mozodulo.iblogger.org/ioptron_skyguider_pro_payload.pdfIn PDF document text
    • http://poguferuliwu.iblogger.org/is_somewhere_over_the_rainbow_from_wizard_of_oz.pdfIn PDF document text
    • https://duxetaxegijojem.weebly.com/uploads/1/3/4/8/134870405/38a87f0.pdfIn PDF document text
    • https://fipugodegiposal.weebly.com/uploads/1/3/4/6/134687615/3651794.pdfIn PDF document text
    • https://piwevowukitibe.weebly.com/uploads/1/3/1/4/131454699/e41eb0cfa6.pdfIn PDF document text
    • https://jowisatog.weebly.com/uploads/1/3/4/4/134403507/4138400.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/356127f9d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://seweromovipuse.epizy.com/53044884452.pdfIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_914a3b80ba1443cfa5b6c61b89e70b7f.pdf?index=trueIn PDF document text
    • http://benamow.myartsonline.com/what_is_the_military_code_for_letters.pdfIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_4bbcf2b3c90f4595b5ab16d779f644d1.pdf?index=trueIn PDF document text
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_9c36b17675bb4e2fb3a615c190ec49b7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000fd4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFD4B 152768 bytes
SHA-256: 044b026bdeaf30e3671a4c01b2dbe57acb10c4206ff93ed5d1b962d20585fe19
font_01_sfnt_off0002bdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BDC2 5400 bytes
SHA-256: 37ec62f874cd912d25d87daf79988d1666ed3dc4d0f096f28b20e172a845d533
font_02_sfnt_off0002d019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D019 11488 bytes
SHA-256: 03348f75981ff3ed49093791ac451642f1b9e06b04f7660a4c50d808917b9e83

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