Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4cd085333333da…

MALICIOUS

PDF

89.2 KB Created: 2021-02-22 06:49:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7ac4492a8df75a9b085fa5d4f3b7d8ab SHA-1: 1d7ef05dda98f84e38090434395770ced6579de7 SHA-256: 2e4cd085333333da4efd797598150edd1bf29d6eb33625bf284780bdeab3812e
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 0.9997

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://bologen.ru/123?utm_term=3d+cad+drawing+software+free+download PDF link annotation
    • https://nipukidifa.weebly.com/uploads/1/3/0/8/130873732/1197873.pdfIn PDF document text
    • https://rudiwiguxovo.weebly.com/uploads/1/3/5/3/135317070/5a6c450a0249e9.pdfIn PDF document text
    • http://trysol.xyz/54792332357du6hn.pdfIn PDF document text
    • https://fiferogupinuwa.weebly.com/uploads/1/3/5/3/135306016/b67fdc8.pdfIn PDF document text
    • http://tvoeobrazovanie.fun/vixezulugukowuwedatolujiy8ulo.pdfIn PDF document text
    • http://stikc.xyz/best_android_tablet_2018_nz2jtxj.pdfIn PDF document text
    • http://konsalting.info/480533911777ons1.pdfIn PDF document text
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/4995337.pdfIn PDF document text
    • https://gabukoxikala.weebly.com/uploads/1/3/3/9/133997771/zabelisilasorog-dikeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guxasimedoki.epizy.com/xflow_cfd_software.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/niladoxusa.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/14178165498.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/australian_tourist_visa_online_application_form.pdfIn PDF document text
    • http://muvusibose.rf.gd/highly_seasoned_stew_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/the_bfg_2_full_movie_free.pdfIn PDF document text
    • http://solazagu.epizy.com/zigogexewobeko.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/67796450684.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/beautiful_quotes_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/lockheed_martin_gps_iii_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/corrective_preventive_action_log_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/78155859657.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_off00011f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3D 5348 bytes
SHA-256: dffabf8f5358bf362fcfe46ce5e87e93391199739a6984f553c97fc3e534bc7c
font_01_sfnt_off0001318a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318A 11164 bytes
SHA-256: 885a70b522f698c49fbb75629feb3cb87187e77fa71587a3b977ece71b9e5011

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