Malicious PDF — malware analysis report

Static analysis result for SHA-256 798470e0d5e63917…

MALICIOUS

PDF

76.6 KB Created: 2021-02-26 20:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 72d2cab9c4737bc56a619b01833af7cc SHA-1: 9e29ef1b4cafba0cb57fb9c4721e5a88b3e11292 SHA-256: 798470e0d5e6391709424df5bdd7fcfe9e0fba8c9e77773be0d8d6fd50a18480
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a common search query, designed to trick users into clicking the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=does+chick+fil+a+serve+breakfast+on+memorial+day PDF link annotation
    • http://dwatches.site/burdah_imam_busiri5yra5.pdfIn PDF document text
    • http://nesobaka3.xyz/3911068051v7t26.pdfIn PDF document text
    • https://rilumawireg.weebly.com/uploads/1/3/5/9/135981263/pedopupigada_tobejamisin.pdfIn PDF document text
    • http://ferobuxanax.iblogger.org/future_simple_negative_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/ximegawaso/jfijkk3/conspiracy_palette_morphe_australia.pdfIn PDF document text
    • http://xusolupofedowi.iblogger.org/merge_excel_rows_from_two_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/zodunoxurob/jajj5eK/steam_sales_2020_summer.pdfIn PDF document text
    • http://ita-fitness.fun/tools_and_equipment_used_in_technical_drawing3vnwl.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/Gygjl1S/swing_shift_cinderella_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/Msib4jh/d-_day_significance_to_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/Nieahdf/paminizugiruwajakekape.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezajezo.epizy.com/bible_tagalog_king_james_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/funniest_kid_test_answers_5.pdfIn PDF document text
    • http://vegunag.rf.gd/53584800759.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/44718641447.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/bet9ja_online_registration_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/vumepagub.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/pivaje.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/android_adb_install_windows_10.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_off0000edfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFC 5624 bytes
SHA-256: 3b0959e24eb6b82dade9069e58455772f6c4f947659ae3ab7bdaf28cd8e16ae5
font_01_sfnt_off00010109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10109 10440 bytes
SHA-256: 1810dde6a31caf783f199ab5bd7c30bf1378cd5bd69bf47893884eaaf5fe2d85

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