Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18804ea7a397d3c…

MALICIOUS

PDF

135.8 KB Created: 2021-02-15 10:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 819bf3c0dc486ef1098339144fb09250 SHA-1: 996bc6a3dff560a779d2603319f95a3484af9617 SHA-256: f18804ea7a397d3ce0961e480d343ca9c371eb39f9931de3fb233974619df134
156 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 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 0.9997

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 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://baarspo.ru/wix?keyword=swtor+sentinel+builds PDF link annotation
    • https://kusonanozeko.weebly.com/uploads/1/3/0/7/130775507/fa07e997f0ba.pdfIn PDF document text
    • https://jagotizepevex.weebly.com/uploads/1/3/4/4/134464701/vavuxekalozaw-bisofivegisisu-jebeguzu.pdfIn PDF document text
    • https://midodelawipage.weebly.com/uploads/1/3/4/5/134585137/vovadotoni-fesosagivaro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408594/normal_601a384512257.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484804/normal_5fdccd1ee98d7.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
    • https://s3.amazonaws.com/dumupa/bahubali_2_songs_naa_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/vozepuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/cahier_de_vacances_cm1_cm2.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/19258165585.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/chen_one_bed_sheets_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/bypass_google_account_android_keyboard_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/scientific_notation_excel_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/23228828974.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/android_air_view_app.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/kirudodaroguwivuxolaf.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_off0001ce71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE71 4824 bytes
SHA-256: b1b1a517827b929e64b8bef4692d8290aa4acc06ee4ec09a5292da09f827f975
font_01_sfnt_off0001dee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DEE0 10840 bytes
SHA-256: 76203f9b33aaef6bb18f01a1c86209319de9ae82aac089c5095aff7984fb2d1e
font_02_sfnt_off000203eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x203EB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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