Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f077881bd4db2a…

MALICIOUS

PDF

75.4 KB Created: 2021-05-03 01:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2b370dd92d4f2dc936d663b8de3648e8 SHA-1: 55a30d2ea7afd4b2eb85bbfe6f7c0cf13f2922b1 SHA-256: a8f077881bd4db2a5c0a12633280ff8e162c60a7c36487dc325c8f51a976d132
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://druttle.ru/strik?utm_term=donald+barthelme%2527s+short+story+the+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413846/normal_6010e1977763a.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/xomovekifirib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445742/normal_5ff1d8aaa8e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501996/normal_600e617dcda99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490739/normal_600c6df7d79d1.pdfIn PDF document text
    • https://bufigolumixi.weebly.com/uploads/1/3/4/2/134234787/wamokupasa_wenijiledesif_wesiwexobogoken.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/jugujufeg.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/the_four_disciplines_of_execution_worksheet.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/outliers_in_statistics.pdfIn PDF document text
    • http://vavazexowupex.medianewsonline.com/8515667654.pdfIn PDF document text
    • http://nitiwomifigurod.mygamesonline.org/a_sample_job_application_letter.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/98457822014.pdfIn PDF document text
    • http://ratixopawem.mypressonline.com/zekakirizefibalekojasukip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474456/normal_603eb55b68e1d.pdfIn PDF document text
    • https://xegupilu.weebly.com/uploads/1/3/2/3/132303007/3113963.pdfIn PDF document text
    • https://fuwowomazusora.weebly.com/uploads/1/3/4/0/134000162/vidinimuzine_gejesobubowusu_mizukupavusidik.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/021c4e61-7b36-4532-a43f-372bc25286fe/33407386133.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/29377308090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d53219ca-3b3b-407c-b04e-2ae0ccc83fee/price_of_samsung_smart_tv_32_inch_in_nepal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b11e4d96-83ae-4766-9e34-1b7fcb52cc34/sample_autopsy_report_gunshot.pdfIn PDF document text
    • http://xowilewegiwo.myartsonline.com/java_jdk_8_download_windows_7_32_bit.pdfIn PDF document text
    • http://putunoxixowelo.atwebpages.com/mathematical_logic_symbols.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/goalrilla_54_in-ground_basketball_hoop_installation_instructions.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/conformational_isomerism_in_ethane_n_butane_and_cyclohexane.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_off0000ea70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA70 5452 bytes
SHA-256: 1603d370651e1a15097b89c05db24ecaefbcbfb26de634ae1f3de322376479b9
font_01_sfnt_off0000fce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE0 10176 bytes
SHA-256: 5344ef0a58e5a57f93dc4a6a7ed0866f45286a09f51e5fd18854ab695e8219d6

Open this report in the interactive analyzer, or submit your own file for analysis.