Malicious PDF — malware analysis report

Static analysis result for SHA-256 68db595567c0f9a0…

MALICIOUS

PDF

87.5 KB Created: 2021-04-10 19:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 73c0e4f32658b469a5afca238f926b2c SHA-1: e65e97b394b6df3da5449f5a9ac2ad2c534ecb52 SHA-256: 68db595567c0f9a0d6924b9b6bec4695ed77eab66a34f4b124518fdd55570677
156 Risk Score

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://nipisod.ru/strik?utm_term=how+to+clean+my+dyson+light+ball+multi+floor PDF link annotation
    • http://tuxesimufimiti.mypressonline.com/qasida_burda_sharif_urdu_translation.pdfIn PDF document text
    • http://dekoriribazovax.mywebcommunity.org/libro_materiales_dentales_aplicaciones_clinicas.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/hAShakG/download_game_zombie_age_3_unlimited_money.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/galeviletunivitidatozi.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/MgfvfHC/44675496977.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/volume_of_cone_worksheet_grade_6.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/nivexupaxanozekanodanolez.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/bejikefowu/79818416029.pdfIn PDF document text
    • https://4bc473c2-84d0-4913-8b4e-281bf44fba2e.filesusr.com/ugd/a25dbd_cb8e988848524abb9b32d9a125ee6f41.pdf?index=trueIn PDF document text
    • https://e2a3f85e-3ce8-4c76-99a2-e63219cad5ad.filesusr.com/ugd/473d25_e63d160830a2493d84d783ab1c3bc40e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/american_chest_guidelines_anticoagulation.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/banished_colonial_charter_journey.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/tum_balalaika_sheet_music.pdfIn PDF document text
    • https://40052bae-d6b0-4be3-9c84-96956a804c69.filesusr.com/ugd/32907c_4acbcdc16a1148cca3da6a409bc57b03.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/canny_opencv_android.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25E 6832 bytes
SHA-256: 3c1499defb01d70bb2cd1a99f2187e9b55a53790071b73e60527571891b9895c
font_01_sfnt_off0000f3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AE 5728 bytes
SHA-256: 220ba22db411d43d272b469f32dae1cfc2f1254c306ece3bf1c04714a7ddfef4
font_02_sfnt_off00010714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10714 2088 bytes
SHA-256: cddb8ace75cb2f50dbcc21663eb84862438872dc53705faec59dc2fa043ca38f
font_03_sfnt_off000110b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B3 11676 bytes
SHA-256: b6a7129f2d77b5ffe2e085018711cb4c546d327e2b2becc74d88c2a92e28496a
font_04_sfnt_off000138dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138DC 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8

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