Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ea0365e6bfb22e…

MALICIOUS

PDF

82.5 KB Created: 2021-05-13 20:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 84fabfb432f3ac489b8cb4d2454baee3 SHA-1: e194e20e668245efba9f68284dd42a7a163a2459 SHA-256: f3ea0365e6bfb22e2c952d6fc7ebee3ef030f2e1514c0320f5c530988e792059
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are associated with link farms. The primary malicious URL, 'https://gimoguvi.ru/strik?utm_term=how+many+ounces+is+dunkin+donuts+xl+hot+coffee', is designed to trick users by appearing as a search result for a common query. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://gimoguvi.ru/strik?utm_term=how+many+ounces+is+dunkin+donuts+xl+hot+coffee PDF link annotation
    • http://xeratigike.medianewsonline.com/47336457389.pdfIn PDF document text
    • http://wssummer.space/footbal_live_streamhi292.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/16869472956.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/14118318666.pdfIn PDF document text
    • http://itprod.space/pdf_base64_string_example6b5e2.pdfIn PDF document text
    • http://nonowun.mywebcommunity.org/13351844958.pdfIn PDF document text
    • http://tekplafond.xyz/biceps_popeye_deformity2llh1.pdfIn PDF document text
    • http://wellwork.site/fasewegonisaqz6el.pdfIn PDF document text
    • http://forecast.bet/xiaomi_amazfit_watch_facessvoqx.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/pibajuwi/nomukijodejadoxipami.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/rezusiwitoferumiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/637a8295-0f1f-4ca5-81d4-0bb4bd404961/golumarofawelolokajojat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0a73fe8-8383-4123-9187-0a52498b045e/30573749261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55770a82-6f70-4dc4-833d-0fb7f1da7cfe/what_type_of_oil_should_i_use_for_my_2016_toyota_corolla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aef05c1-0924-4d19-abea-a74b3a703e03/the_road_less_traveled_movie_soundtrack.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/zujajozet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8ce723-a8e1-4e66-b184-a7edd20f211b/lezipepowexolimi.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/physics_textbook_class_11_cbse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c6afc3-adaa-4f81-b110-ee55421a07e2/how_to_adjust_ventilator_based_on_abg.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/tebejozegekej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf30e98-489c-445e-8885-8db8b9712fff/21623316253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64b850c-7063-4cd2-abd0-4de08ad8fa51/bayesian_statistics_in_r_example.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_off00010350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10350 5452 bytes
SHA-256: 7864adf9a46bc0cce21208da2a46c5632afc0e5f7234c8a17ee88d301ccbba93
font_01_sfnt_off000115cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CF 11268 bytes
SHA-256: ece6c345e4cbfccd4b8a7dc0aab6d85716644d4cb0052f30601e292b0c22c01c

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