Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb83fd4d542206c…

MALICIOUS

PDF

118.5 KB Created: 2021-03-17 23:32:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b2d14d2c25e63fb42697b908fd313873 SHA-1: 96276a4fbf6f2f4b045456ef8d7cdcd09e5b6f0c SHA-256: fbb83fd4d542206c5436e8e283de4e3db78a887b858b93edca6113e5d98d07f3
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 0.9985

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://soxebez.ru/aws?utm_term=how+to+make+symbol+on+mac PDF link annotation
    • http://foxilajat.sportsontheweb.net/sigodiku.pdfIn PDF document text
    • https://cdn.sqhk.co/rizavoxaje/Ehfjijg/history_of_nigeria_colonization.pdfIn PDF document text
    • https://cdn.sqhk.co/bafujifi/ifvS3gc/free_ringtones_for_iphone.pdfIn PDF document text
    • http://galufixagomedo.getenjoyment.net/78842976115.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/QiapApo/life_after_death_book_summary.pdfIn PDF document text
    • http://kozijadeji.22web.org/28622820903.pdfIn PDF document text
    • https://bukodagunotul.weebly.com/uploads/1/3/4/0/134012399/dorumiwudaleb_xafowap_zavuga.pdfIn PDF document text
    • https://fanamixaxa.weebly.com/uploads/1/3/4/0/134017579/5f569e79ff.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/what_is_honda_service_code_b13.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/uQdugjJ/nail_art_designs_simple_flowers.pdfIn PDF document text
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/CopyrightIn PDF document text
    • http://www.typoland.com/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lawakux/ch2o2_lewis_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/writing_hypothesis_worksheet.pdfIn PDF document text
    • http://xetorofowuwid.epizy.com/6229260714.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/freedom_of_information_letter_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/dezepokuj.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/handwriting_without_tears_letter_e_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/alpe_d_huez_snow_report_april.pdfIn PDF document text
    • http://fekugulivajul.epizy.com/city_planner_geometry_project.pdfIn PDF document text
    • http://savekuf.rf.gd/23248668393.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/aayirathil_oruvan_movie_in_einthusan.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/juviw.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF770 3936 bytes
SHA-256: 31def6f2c29496da450f7890a58a01ace99a01d99538a98a2ac2551e75042598
font_01_sfnt_off00010558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10558 6168 bytes
SHA-256: de6aacb5a55f55b98bf3ae384f96a51051c900e5a59c241f5198d539ce1a3af5
font_02_sfnt_off000114f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F8 4948 bytes
SHA-256: 2a2192d83e9e16d325e781bebe412031795f72f02d6740196e0dd1384dbb80e6
font_03_sfnt_off000125cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CF 27740 bytes
SHA-256: efbc0b10806b6adb9be480c6846baa1d68affc2775e45d7f6c9b626e88695d12
font_04_sfnt_off0001724a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1724A 34080 bytes
SHA-256: af9621e1cdf2d8c2dfd6657c22daa7802f6142b9ebc12170eae0f6e0a4e2c5fb
font_05_sfnt_off0001bd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD48 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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