Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63e94f6a386aad4…

MALICIOUS

PDF

81.5 KB Created: 2021-09-20 12:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9783300afe76396663ddeed479a71ad0 SHA-1: 3b9016a249103ebdc4d0af74cd7d8647ba5ecd5f SHA-256: e63e94f6a386aad47e715b62eb6a01045193d9de6d382d14028dbebaa9452791
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm, with multiple URLs pointing to potentially compromised websites or disposable hosting, disguised as content related to movie downloads. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/uplcv?utm_term=titanic+full+movie+gomovies PDF link annotation
    • http://nationshield.ae/userfiles/files/penuk.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/11704559247.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/wigenawiviremed.pdfIn PDF document text
    • http://brno-skoleni.cz/ckfinder/userfiles/files/xadurenatod.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/poxukosutubi.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/nikafojetakirepovepudowip.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/genarikopukagekigowak.pdfIn PDF document text
    • https://cubic.is/userfiles/file/43538651065.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/d0d4abcbe7277085ae52c6809e7581e8/23619218870.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/64320077723.pdfIn PDF document text
    • http://ohmytour.kr/FileData/ckfinder/files/20210916_EBD2A8A872E2389C.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/danuwibagosuvube.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/9961989864.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614218ca95748---86090233867.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/39565667673.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/gaxawojokefonogopogup.pdfIn PDF document text
    • http://fullerton.kopanramen.com/uploads/files/24220326892.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/jitinewisa.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/b58153a45ed703ac16a278d1d7efc104/63748745381.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/wenudod.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/59744174516.pdfIn PDF document text
    • https://kingbakerypans.com/userfiles/file/2970613737.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161462427ab2c6---jiwebifubavarowiduti.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/kefujajuzo.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/wokojaworoneritapasilekuf.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/bexutuloziwamikajavig.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/wasirolaviven.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://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_off0000da53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF265 17444 bytes
SHA-256: f26dcc710d4c8e8064c540e4efd915155590055e60c48e471a4676458eb7053b
font_02_sfnt_off00011fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCC 10708 bytes
SHA-256: 22d0de58911e3ce89a92362d130178f96b64e45df934727b61c4e24cd064f139

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