Malicious PDF — malware analysis report

Static analysis result for SHA-256 6061d7b30f41bd1e…

MALICIOUS

PDF

66.1 KB Created: 2021-01-26 18:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4f48a0bcdb460e1970a9ed1f1ec3e04c SHA-1: 4f1eed027b7347a43a13b55b27464dcb9b7fa6c3 SHA-256: 6061d7b30f41bd1ea9d99a97254fdff2b3eddc784476275f75256c0e94ffb879
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The document body is heavily obfuscated, but the presence of numerous external URIs suggests an attempt to lead the user to a compromised or malicious resource.

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 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://bologen.ru/123?utm_term=natures+purest+bassinet+mattress PDF link annotation
    • https://sajakuvidosub.weebly.com/uploads/1/3/4/4/134496924/112635.pdfIn PDF document text
    • https://faliroralomi.weebly.com/uploads/1/3/0/8/130874474/kejasa.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/58fe9ab3081f493.pdfIn PDF document text
    • http://gikilebi.iblogger.org/android_auto_clicker_no_ads.pdfIn PDF document text
    • http://bavedibigilomit.66ghz.com/wubesupesisagajut.pdfIn PDF document text
    • http://manaluw.iblogger.org/1332151695.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jazupizewatabal.epizy.com/chucky_hd_wallpapers.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/bofarolofamajajudidewewog.pdfIn PDF document text
    • http://lafanibawonol.rf.gd/dragon_ball_fighterz_android_21_voice_actor.pdfIn PDF document text
    • http://pikididubemet.epizy.com/epidermal_growth_factor_receptor_inhibitors_acneiform.pdfIn PDF document text
    • http://pobuwejugu.epizy.com/rukunidoral.pdfIn PDF document text
    • http://nemebikox.epizy.com/95150476858.pdfIn PDF document text
    • http://maguzuj.rf.gd/coolie_number_1_bhojpuri_movie_hd.pdfIn PDF document text
    • http://kesotufujurox.rf.gd/92796204413.pdfIn PDF document text
    • http://losuguv.epizy.com/65042174873.pdfIn PDF document text
    • http://xoponupesede.epizy.com/accident_report_bureau_albany_ny.pdfIn PDF document text
    • http://fofifalog.rf.gd/mimetoxivesunabanibubeso.pdfIn PDF document text
    • http://tiwisuk.epizy.com/character_setting_plot_graphic_organizer.pdfIn PDF document text
    • http://wojobawezelo.rf.gd/graphing_linear_equations_questions_and_answers.pdfIn PDF document text
    • http://magomodatibotu.epizy.com/gopaxulag.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/telecharger_anime_slayer_apk_2018.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_off0000c352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC352 5044 bytes
SHA-256: 55c6d9968875ca58c128d1efd5e7a5ef549c90b43def02e6503f03de71656f85
font_01_sfnt_off0000d460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD460 11004 bytes
SHA-256: 8031ac1c26dbd131a2f398e2fc62f0e0bad1a9fbe86fb8938151e158e50b0f60

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