Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b410eac63bcaefa…

MALICIOUS

PDF

85.6 KB Created: 2021-04-01 00:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f682934ea1c634f24d715024374abe9f SHA-1: 729ec10dcbe4f681b2443b052efd9a8d256720b0 SHA-256: 0b410eac63bcaefa770c4580f4723956079b62cbbd22b84b78333b58e76a5b92
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/wix?keyword=8th+grade+science+review+packet+pdf PDF link annotation
    • https://xagiwejobumumok.weebly.com/uploads/1/3/6/0/136051235/dejifanisibi_xasasojafow_lamomupetoratob_xewuvas.pdfIn PDF document text
    • http://dupigetibulira.iblogger.org/anarkali_movie_songs_maango.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5fe995813649b.pdfIn PDF document text
    • https://tirotulesi.weebly.com/uploads/1/3/4/8/134849952/1828845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_60152aa963a5d.pdfIn PDF document text
    • http://sevesasineja.22web.org/letter_f_tracing_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_605d061f295b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_603bad2dc3604.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472501/normal_5ffeb3bea76be.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/fosalizuzu/calories_in_a_sonic_breakfast_burrito.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/black_magic_book_in_bengali_free_download.pdfIn PDF document text
    • http://totaraxidob.rf.gd/ccim_bams_1st_year_syllabus_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/design_doll_full.pdfIn PDF document text
    • http://tupomomi.rf.gd/c_l_a_t_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/is_onyx_safe_for_aquariums.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/hp_laserjet_2100_m_tn.pdfIn PDF document text
    • http://niniwakuruvip.rf.gd/wojinek.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/calibre_converter_for_android.pdfIn PDF document text
    • http://bebubizaguwadef.rf.gd/yogasana_book_in_tamil.pdfIn PDF document text
    • http://jipokogave.epizy.com/railroad_tycoon_3_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/55990782704.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/franchise_marketing_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CB 5700 bytes
SHA-256: 9b0713fc1bb359d5b5181e1a79df7e6f9054ad29aa4b2e445bf44f29858ba9a5
font_01_sfnt_off00010a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A40 10592 bytes
SHA-256: 0b52ac93a54f9b664f74662f52c4b5c70a7abf435058f9b0587c40981545787f
font_02_sfnt_off00012e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9C 17560 bytes
SHA-256: 778a9feeba07cb85fd3681ddcfd38787631dcdc44684878bd038c21ebcaf2c7c

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