Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e8ef0559fab9fe…

MALICIOUS

PDF

90.1 KB Created: 2021-04-02 09:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5ab3ed201785736eb4be6c6c91ced2e9 SHA-1: cd1e750f9b288598c18e6c9bf12d7ef739e998a6 SHA-256: a7e8ef0559fab9fe3af685ca941e86f24af955379e65e4467ca3f89381835719
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The document body, though heavily corrupted, contains text related to a movie title and PDF generation tool, which may be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/wix?keyword=1917+pelicula+online+gratis+castellano PDF link annotation
    • http://razidazimako.iblogger.org/84513220407.pdfIn PDF document text
    • http://yourbigdick.space/tchibo_cafissimo_pure_hasznlati_utastsrt51t.pdfIn PDF document text
    • https://dibumofum.weebly.com/uploads/1/3/5/3/135313591/ef1bb.pdfIn PDF document text
    • http://changely.club/dewevoloposmqe.pdfIn PDF document text
    • http://ritivukepexu.22web.org/zavixirilepoz.pdfIn PDF document text
    • http://medugogubi.22web.org/pilumoguzemirug.pdfIn PDF document text
    • https://webenewosa.weebly.com/uploads/1/3/1/4/131409170/8f5438.pdfIn PDF document text
    • http://arnautmebel.ru/nebazutixeladonitibogadb4t9e.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/2498b4c.pdfIn PDF document text
    • http://zexawil.22web.org/zunuxudowexuxixeruseraw.pdfIn PDF document text
    • https://wotixefutakit.weebly.com/uploads/1/3/2/8/132815753/zoduxatawa_ditiregup_dusemi_mepojogaxupedi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bac5a35-c92f-453c-9690-4746af360604/42554885966.pdfIn PDF document text
    • http://vugixemavofagen.epizy.com/contoh_rpp_k13_sma_biologi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d785c9f9-b393-4fe1-bac6-87c5fcae944a/the_real_book_piano_jazz.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/potusagutajusi.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/how_to_get_stuck_bobbin_out_of_bobbin_case.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0907f1b0-113d-4295-983a-367e2b8f1555/xizomuwutolifutiwulavuxuz.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/shehar_ki_ladki_badshah_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/possessivartikel_deklination.pdfIn PDF document text
    • http://runugerobel.rf.gd/jorobevixamasufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19bfb301-d435-437c-becd-c2df218e9254/bevebenalasivaxejosiwisot.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/history_of_western_philosophy_timeline.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10385 5292 bytes
SHA-256: 7f6ba67c0ab738ea55218c248b3110a2446167c7f313136c88b38d4c49f8eefe
font_01_sfnt_off000115a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A2 15604 bytes
SHA-256: 3c73aaca3bef973e10d7985796cce480dde04c82fdce4962d3db32c898893e77
font_02_sfnt_off00014326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14326 16412 bytes
SHA-256: 154a9811779fe27caeb4eae679577d500af1cc93e911826c51422dd5137ebc93

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