Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0221fce9ee606c…

MALICIOUS

PDF

77.9 KB Created: 2021-03-27 22:41:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7de72b7e41e328b9d47289b73c1eca17 SHA-1: 6cecff21f824f214769f0babe5cbfbe2abf03dcd SHA-256: 5d0221fce9ee606ce9e83176d8d2778bf4e115afb22f6090462e38954f6ed601
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. The presence of 'boxing+star+mod+apk+versi+terbaru' in one of the URLs indicates a lure to download a modified application, a common tactic for phishing or malware distribution. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/123?utm_term=boxing+star+mod+apk+versi+terbaru PDF link annotation
    • http://com-copyrighit.com/10360923499gphzp.pdfIn PDF document text
    • https://cdn.sqhk.co/temazajilib/Tf9iajd/lenijikifinuxajup.pdfIn PDF document text
    • http://zitosuganenat.medianewsonline.com/34232583767.pdfIn PDF document text
    • http://nnorm-id.com/mipadejiwegawixuvovuwxyp9.pdfIn PDF document text
    • http://rasidafepu.mypressonline.com/damon_and_pythias.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/jAOLeic/kikezegoxudepojujenigoso.pdfIn PDF document text
    • http://feyakast.online/what_medical_expenses_are_tax_deductible_for_20200vasz.pdfIn PDF document text
    • https://cdn.sqhk.co/woxiwovar/6hhhe99/94090196326.pdfIn PDF document text
    • http://itgermany.net/ryobi_1700_pressure_washer_manualog8or.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/2020_top_romance_books.pdfIn PDF document text
    • http://xajotupefaku.22web.org/jelaxiwevexetebonanamuge.pdfIn PDF document text
    • http://zootime.store/diono_radian_3qxt_width6eo5p.pdfIn PDF document text
    • https://cdn.sqhk.co/sirojenu/aihrT1O/16483331558.pdfIn PDF document text
    • https://cdn.sqhk.co/filovixedalu/jiie64w/19361804946.pdfIn PDF document text
    • http://cleaner360.shop/canon_pixma_mx922_printer_error_code_b200eas5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://loxabireja.rf.gd/oshima_writing_academic_english_download.pdfIn PDF document text
    • http://sogonuvusawi.epizy.com/this_is_to_inform_you_all.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/marineland_penguin_bio-wheel_200_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/bangladesh_railway_job_application_form_2019.pdfIn PDF document text
    • http://gogedejejap.rf.gd/are_you_smarter_than_a_5th_grader_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/vpn_android_source_code_github.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/fefiporejizevad.pdfIn PDF document text
    • http://vekamodadon.onlinewebshop.net/calistenia_plano_de_treino.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_off0000f4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A1 5628 bytes
SHA-256: 3e939bf1d7646a9f0f319208ad806c48578ffbd11acbad5d2996551601412d2f
font_01_sfnt_off000107c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C6 9984 bytes
SHA-256: 5316242b488450cd8175dcdd288289588d8c019a0d9386980f7dd74a21ed7b6d

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