Malicious PDF — malware analysis report

Static analysis result for SHA-256 304874dbc20780de…

MALICIOUS

PDF

84.1 KB Created: 2021-02-19 10:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b1354395253e5dfc2a010987e9358a30 SHA-1: f4bc50e3c92e51e9340297fb8131a5f7f2881730 SHA-256: 304874dbc20780de39c483fef1ee8355ef688e40eb0685a997eb61dec6e09122
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=explore+learning+household+energy+usage+answer+key'. This URL is presented as a learning resource, indicating a phishing or social engineering attempt. The ML classifier and ClamAV also strongly indicate maliciousness. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=explore+learning+household+energy+usage+answer+key In PDF document text
    • http://samyog.ru/2363981124a4hma.pdfIn PDF document text
    • http://world-wildshop.com/alpha_helix_vs_beta_sheet_stability2sgae.pdfIn PDF document text
    • http://teachersaid.fun/79641144604uwu6m.pdfIn PDF document text
    • http://milansit.space/kuduxudodawikabajepusinujd6g7j.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/fxhemSy/gisexajojomonuviwawag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/trendy_versatile_coming_soon_template_nulled.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/16108497103.pdfIn PDF document text
    • http://mugoxox.epizy.com/acrobat_reader_and_editor.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/nissan_armada_2012_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/biswanath_chariali_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/amazing_grace_song_video.pdfIn PDF document text
    • http://pagiburisodu.epizy.com/length_unit_conversion_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/cowboy_theme_song_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/aidl_example_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/32659553968.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/vorasejupew.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/bubuzulasowotirisitepima.pdfIn PDF document text
    • http://pezedavepajizum.rf.gd/pitisifisirevunolafora.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED24 5504 bytes
SHA-256: 2d2f2b01077769b11eccd8a6dd2d43bdf0af53fa22802cff19a4352dc81369c5
font_01_sfnt_off0000ffe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE8 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00010876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10876 10360 bytes
SHA-256: 7331f9dc9ec222cf8110c5a02c0c234818e38fc538b3d8ac83a8e6d69d743866
font_03_sfnt_off00012c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C28 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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