Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1214c5a134ffe1a…

MALICIOUS

PDF

92.2 KB Created: 2021-09-17 13:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 1763154324b4af25c76e96c2d25101d7 SHA-1: b04a8b267e25fc538f57a0c3603a9e52610d2ce8 SHA-256: d1214c5a134ffe1a8a6699a2c213965f09a2ce2d6937c351cab53340e7e08676
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to host numerous links to potentially malicious or spam content. The embedded URLs, while many are marked benign, contribute to the overall suspicious nature of the document by acting as a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://grupopiscis.com/upload/files/ludanudamemafabem.pdf In PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613fea92cdfe1---85868092977.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/zesameviwugeje.pdfIn PDF document text
    • http://orzo.cz/uploaded/files/24847016128.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/75899190044.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/45363287007.pdfIn PDF document text
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/72239351168.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/rejakikepitik.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/79678155135.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/norirosorutumivudewa.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/86535594901.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/ef265214e71ee902f14e12b0e630e6d3/wakiluvuvesow.pdfIn PDF document text
    • https://krzczonowice.pl/gfx/file/pimedobifawaxijepas.pdfIn PDF document text
    • http://elitacasa.it/images/file/jusuloju.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/muxikisasemupoporuj.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/zifapugofojizugamiwo.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/detanepibitivupala.pdfIn PDF document text
    • https://maffart-guy.com/userfiles/file/72304519388.pdfIn PDF document text
    • http://bergepkolcsonzo.hu/userfiles/file/pipupa.pdfIn PDF document text
    • https://eletmodguru.hu/files/files/lunivemevabimilexowomuto.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/92538751030.pdfIn PDF document text
    • http://full814.com/upload/files/nenekigaviwugadiv.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/sefufaxomosojupomuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=21+blackjack+online+espa%C3%B1olPDF link annotation
    • 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://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_off0000fefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFC 18808 bytes
SHA-256: 1d9eecf747061b3388c26367b1cd1eace67c7302173ef50e47738bf358cc0db3
font_01_sfnt_off000130a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A5 10812 bytes
SHA-256: 84406ca3bbdb82be4de64ffbc614785c9d3f14cb7ad0fb4344955c4ee1871212
font_02_sfnt_off0001494a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1494A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1