Malicious PDF — malware analysis report

Static analysis result for SHA-256 27395a9002987e7f…

MALICIOUS

PDF

74.9 KB Created: 2021-02-25 13:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00e574c9db6d23831e0434da37c77873 SHA-1: 948961a1fe1adca97632f5e539098662798ea23a SHA-256: 27395a9002987e7faf1ba5d9e9341dd6f4721602bec613c03b36b5e9ba757e2e
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attack pattern focused on redirecting users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/123?utm_term=reaccion+de+combustion+etanol PDF link annotation
    • https://cdn.sqhk.co/tegasipitif/jbCiatV/backgrounds_for_samsung_s10.pdfIn PDF document text
    • https://cdn.sqhk.co/legikowe/ySjikhf/3669213757.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/nujuvimelasolapojebi.pdfIn PDF document text
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/gewipon.pdfIn PDF document text
    • https://fapuwokezisojo.weebly.com/uploads/1/3/1/4/131453853/dejopeda-babobibepapani-jabobubasoma.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/cjavjdp/burokido.pdfIn PDF document text
    • https://belinadojo.weebly.com/uploads/1/3/1/6/131607131/4a4aa4cbbd8b.pdfIn PDF document text
    • https://nevedaroxizewav.weebly.com/uploads/1/3/4/5/134592578/4802957.pdfIn PDF document text
    • https://dexejajakoto.weebly.com/uploads/1/3/0/7/130739268/1cea4694d791ee.pdfIn PDF document text
    • https://cdn.sqhk.co/mixirulizab/Jziegfi/luwanovubisamarime.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/fujifilm_xp70_review.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/smart_car_repair.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/nivewij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wofaxil/24845115400.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/43907105900.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/xaloboganilajenexakiv.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/artisan_scope_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/quarterly_calendar_template_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/katevikovutufuge.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/marginal_abatement_cost_curve_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/putuki.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_off0000d29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29D 5136 bytes
SHA-256: b65c26727894cb9b0ecb872998462bd3c420cd7a5656a7ccf38a081813e21173
font_01_sfnt_off0000e400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 11276 bytes
SHA-256: c5432269a2dd35859f5ce3a8bdf1eed958ea9440dc8f56ddbafdd4762f4628de
font_02_sfnt_off000108bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BF 16084 bytes
SHA-256: 9c0b324cb00f432843e7bf6aa6681d4ee1950797a85fd697fe0bc8b121e8710a

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