Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e298fa27d3aee6…

MALICIOUS

PDF

75.9 KB Created: 2021-03-23 20:23:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f409600ec8840d4612b83c69f830156c SHA-1: 98a778724a6180205488cf5b87af7c2f49ac6a06 SHA-256: 13e298fa27d3aee662f73b70efd996f8661f0ee7d1e98dc41916e9d56fb5e678
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://leonvi.ru/award?keyword=appointment+of+auditor+companies+act+2020+pdf PDF link annotation
    • https://simebusuf.weebly.com/uploads/1/3/1/4/131406507/9a48a8ad885f1.pdfIn PDF document text
    • http://pijojavoto.mygamesonline.org/voleb.pdfIn PDF document text
    • https://wuwinotidewav.weebly.com/uploads/1/3/5/3/135349353/ebddd67.pdfIn PDF document text
    • http://mufosubofamar.mywebcommunity.org/folixivivawuxinudim.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/92918128033.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/7914380.pdfIn PDF document text
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/d7d9f6ce9dd8652.pdfIn PDF document text
    • https://potisejomi.weebly.com/uploads/1/3/6/0/136092970/gijaba.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/pukamuvinunabin.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/dexegubabiles.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/zemunomipazikez/tubepuvadatamibidi.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/17015275549.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/letter_m_colouring_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/abc_of_electrocardiography.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/tricep_kickbacks_proper_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/15488824965.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/begezelos.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/line_6_pod_2.0_van_halen_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/35778751467.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/mrs_funnybones_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/jaxefipovijulawitinoneku.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/aadhar_by_mobile_no_and_name.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/87385522123.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_off0000e995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE995 5532 bytes
SHA-256: 74bf3312ad7ae04015df367fe14c9db24dcb56d47e9d09843b82404307207c0f
font_01_sfnt_off0000fc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC51 10396 bytes
SHA-256: a6e83ebf291d96e55c08c98a5ecf7810bf1eb80407a0a89fba75d2dab6209bdf

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