Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc6f6a2ee774a39…

MALICIOUS

PDF

88.9 KB Created: 2021-04-01 15:37:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: da75735b35961a9eb9dc1627daf766da SHA-1: b1f264fbb03613deebd9cd59ed600f143a8d9952 SHA-256: bcc6f6a2ee774a394afb4ffadaaeff0f645a723569631940eaad92b4d808ddda
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm for SEO manipulation, likely to host phishing pages or malware. The presence of external URIs suggests the document's primary purpose is to redirect the user to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/wix?keyword=pekka+coc+attack PDF link annotation
    • http://juwupexutaval.mywebcommunity.org/45438171235.pdfIn PDF document text
    • http://nadurejiw.22web.org/2012_hyundai_sonata_owners_manual.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/predicate_nominative_worksheet_with_answers.pdfIn PDF document text
    • http://richmaya.site/babli_badmaash_songjulkg.pdfIn PDF document text
    • http://kokulotasuz.mygamesonline.org/quimica_inorganica_ejercicios.pdfIn PDF document text
    • http://nafigunagofadab.getenjoyment.net/82053069497.pdfIn PDF document text
    • http://chelamela.org/how_to_increase_something_by_a_scale_factorluqau.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/math_for_kindergarten_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f50ece36-1901-4a7b-9396-968a400df7f4.filesusr.com/ugd/3ecb95_a7861696c6bf47278930aafcbb3e6869.pdf?index=trueIn PDF document text
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_3de19baf9bec4ce39bdfb558cac4eaeb.pdf?index=trueIn PDF document text
    • http://vulavoviduba.epizy.com/adobe_signature_field.pdfIn PDF document text
    • http://pofitubawonu.atwebpages.com/4379171007.pdfIn PDF document text
    • http://pewulalabes.epizy.com/berkheimer_estimated_tax_forms_2018.pdfIn PDF document text
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_3ae669d2354a4a25a18f75661765ee77.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/dust_jacket_template_indesign.pdfIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_60965a6f13e647e3971e5aa37095edfc.pdf?index=trueIn PDF document text
    • http://nukilaba.myartsonline.com/53335883091.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/tasewi.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_8953822f7eaf448ea84b4d68e8b70c8a.pdf?index=trueIn PDF document text
    • http://gitakezag.epizy.com/fabijosu.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/53289187593.pdfIn PDF document text
    • http://xozutafutigifa.rf.gd/carol_dweck_growth_mindset_article.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 6564 bytes
SHA-256: 969b457339e8e7fa11b0059679cd17e92cbca346bf2a752b539839a2c4984c3a
font_01_sfnt_off0000fd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD30 4552 bytes
SHA-256: 26ebd201f3fa58282cf4f7be7d417975ba11f880df6b58de6b411547acdb1016
font_02_sfnt_off00010cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBC 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_03_sfnt_off0001154a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154A 11128 bytes
SHA-256: c82e9648e372efb0caa8ca8ede5630b92a004bf73cc54e3edcc5e6eee63cdc0d
font_04_sfnt_off00013b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B77 17548 bytes
SHA-256: 1922e8c8031a833120aa4a2e0ccc5109f3464e0612c07939d0ccf95818f2d2d1

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