Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d9febf7f6edb12…

MALICIOUS

PDF

80.4 KB Created: 2021-03-24 03:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79d64f595255b0bec1dfeb5bf17848d8 SHA-1: 7ac45389c30dc7d1b950b18bfa86b3c61dad1b54 SHA-256: c2d9febf7f6edb12a2408e5b9f2ff37c941615779753efae22afed40d2f44bbe
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to lead users to compromised or phishing domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=blast+and+cruise+cycles
    • http://pay-order.info/pataxejidenubemazewefoyf8oi.pdf
    • http://awpmode.com/524850327701rmz9.pdf
    • http://firstsecu-paypal.com/ravekeputozunuxedbl1yp.pdf
    • https://static.s123-cdn-static.com/uploads/4471099/normal_5fcc0d85043a0.pdf
    • https://cdn-cms.f-static.net/uploads/4413244/normal_601e48cca3dd8.pdf
    • https://cdn-cms.f-static.net/uploads/4402721/normal_5fe8c8d299e60.pdf
    • https://cdn-cms.f-static.net/uploads/4473375/normal_604a9af4f0b09.pdf
    • http://kekewawoxugar.sportsontheweb.net/33894056919.pdf
    • http://kafofal.mygamesonline.org/kotasokidetazuz.pdf
    • http://digitaltoolsfor.xyz/21153042102d153y.pdf
    • https://warigiwedekepap.weebly.com/uploads/1/3/4/6/134655399/guvubimudepa.pdf
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/xojixilawu.pdf
    • http://whitecheat.xyz/lukafetudamunadoreros3xt0i.pdf
    • https://cdn-cms.f-static.net/uploads/4408174/normal_60363520eb0fb.pdf
    • http://idealslimitalia-oficial.site/2001_chevrolet_s10_owners_manual9k2vr.pdf
    • http://wepijafiguwenan.mywebcommunity.org/meningitis_tb_adalah.pdf
    • http://umkatrade.ru/whats_in_coleman_fuelyldud.pdf
    • https://cdn-cms.f-static.net/uploads/4413848/normal_6038265d7dc61.pdf
    • https://cdn-cms.f-static.net/uploads/4384645/normal_60566d42a21ed.pdf
    • https://cdn-cms.f-static.net/uploads/4408478/normal_602ae05a7b0c7.pdf
    • https://nojemalof.weebly.com/uploads/1/3/0/8/130873850/1974106.pdf
    • https://dezilupogebog.weebly.com/uploads/1/3/4/1/134109094/lijijuvimaku.pdf
    • http://saudiautoinsurance.com/99946509829mms6r.pdf
    • http://websecurer.tech/que_es_velocidad_tangencial3p2sx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd51.bin
678e9428982a76f8871e913ed432960c21f4dde8aeeea8f61db49ece6de281ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD51 5084 bytes
font_01_sfnt_off00010eb1.bin
9f74eaae4831e8c827b2bd14241c5ece6668c7832f0b29c718b7e3976c490a1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB1 10360 bytes

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