Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad0fbb691102197…

MALICIOUS

PDF

76.0 KB Created: 2021-03-22 08:53:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 62ba3d0e7772c9c37cc2c235d23b9a87 SHA-1: de660487cf5022408d84dd5c8041d903d317de4b SHA-256: dad0fbb691102197e9b545d0bb8780e0a04eaf56b48ebd8cd47a68d3c36f4893
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 0.9991

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://jottigo.ru/123?utm_term=reliability+statistics+pdf PDF link annotation
    • http://figironeme.22web.org/burize.pdfIn PDF document text
    • http://dubiniba.iblogger.org/brandenburg_concerto_3_piano.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/peveziwoguxuzam/befujawalosapibimuganaku.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/11404545393.pdfIn PDF document text
    • http://zavivemigowoson.epizy.com/incident_accident_report_format_and_contents.pdfIn PDF document text
    • http://ritajegowi.epizy.com/heroes_of_the_enlightenment_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/emulator_android_ringan_terbaik.pdfIn PDF document text
    • http://mukexojot.rf.gd/73090752819.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/crystal_report_datediff_age.pdfIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_b6528f37ee1d41f782ec4f87445a21e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiniruru/what_is_the_opening_line_to_auld_lang_syne.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/83666453136.pdfIn PDF document text
    • http://nusakarut.epizy.com/95836070521.pdfIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_4e6e0b83dcc243709dd730e04ad1157a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejexe/does_texting_affect_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/68570061078.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_8b79ab954b5a459db9a84e5e23614cb8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/desenaz/kininit.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/calories_in_taco_bell_sauce.pdfIn PDF document text
    • http://derajovaku.rf.gd/bsplayer_codecs_pack.pdfIn PDF document text
    • http://jipinasin.epizy.com/86638968269.pdfIn PDF document text
    • https://0d801636-e20c-47cf-9654-f2c4f0d28fb9.filesusr.com/ugd/2e7c9c_dd1ff9433e6b4bd5bd90381f2ca7a7ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/flagstaff_arizona_10_day_weather_report.pdfIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_bb21995b05bc40ab8bf9896ab9d15851.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazopaju/tipoxofesuvepo.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_off0000ec91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC91 5300 bytes
SHA-256: e9e6653a89aebdf868d728936e004ddc77cce0e060dfba90298e23f06cef58cf
font_01_sfnt_off0000feba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBA 10556 bytes
SHA-256: 4c06ae61b68f53d7ed3a3554260979cd4c8f26c998f0831ae2b270a7ecc17096

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