Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec828278df6c4eb…

MALICIOUS

PDF

77.7 KB Created: 2021-03-17 22:19:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9c93ca1d463ad511788cc65242e7f450 SHA-1: 7fe831e5dd437785d55fea3eaea56150469a644a SHA-256: 9ec828278df6c4eb4e6a0b2d5bf1a9e6b03f21f8517ba7f1cc02eab5465f0f96
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one specifically pointing to a movie download lure and another acting as a link farm on disposable hosting. The presence of these URLs and the overall structure suggest an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/123?utm_term=bullet+raja+full+movie++720p+mkv PDF link annotation
    • http://kartaidatodemeleri.com/boxhead_vs_zombies_unblocked5837o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386089/normal_5fcbc63cd8a0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459325/normal_6006934b1da49.pdfIn PDF document text
    • http://chelobaka.space/lumuvutiritaxos3z5wn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455684/normal_6023ec10c497a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366365/normal_5fccd1cadad69.pdfIn PDF document text
    • http://com-signto6.xyz/penny_dreadful_tarot_cards11yz5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gegumapobok.rf.gd/age_of_sigmar_terrain_ideas.pdfIn PDF document text
    • http://pitugozuput.epizy.com/84313302844.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/10805663491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebfd75c0-041d-49c5-a5f0-f5f62fee8c40/ge_advantium_120_parts.pdfIn PDF document text
    • http://pejibuturu.epizy.com/brother_sentiment_whatsapp_status.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_cc578e8cfd494343b288c3d06e4af4a7.pdf?index=trueIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_03ca068ed9324d849425616571e2ba51.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2afe7170-ea5a-433e-8e1e-9649d237bb8f/ronexi.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/how_to_use_positive_discipline_in_the_classroom.pdfIn PDF document text
    • http://jonesunomipavi.rf.gd/app_to_download_free_books.pdfIn PDF document text
    • http://bupozefi.epizy.com/djia_cnn_stock_report.pdfIn PDF document text
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_f284c55677fc446a9bfb3b7a27ef2d52.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/96945743783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8918428f-2503-495c-abfa-9672429a9e2b/how_to_replace_the_bobbin_case_on_a_singer_sewing_machine.pdfIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_dfecd9a6ee024d8eb4f9009204f8c59b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/quantum_chemistry_levine_7th_edition_solutions_manual.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_off0000f02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02B 5472 bytes
SHA-256: 2a09f99d88ec5253568c373d703c00d855032e86b3ea3ce4dbd6ee320584b4e3
font_01_sfnt_off000102cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CB 11408 bytes
SHA-256: ad92dedb3b1ff035fe833db53cbbc2647de9958c54ea0921f1e1763a8d3bb8ea

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