Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aace454fde75a45…

MALICIOUS

PDF

84.0 KB Created: 2021-05-14 02:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d294a147fff9cfc05122ee130776e095 SHA-1: 554aa62bd746d6fa5ddf0807c68352322723ce47 SHA-256: 6aace454fde75a45698f8f2aae4a91ab93a8a075ee3d39cb646d38b187a75b80
186 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 0.9997

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
  • 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.
  • 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://resalured.ru/strik?utm_term=rectifier+diode+identification+chart PDF link annotation
    • http://kifopelidito.mypressonline.com/8949789700.pdfIn PDF document text
    • http://gipawavanitexe.22web.org/7439780276.pdfIn PDF document text
    • https://rasazumeg.weebly.com/uploads/1/3/1/4/131454762/3534461.pdfIn PDF document text
    • https://rukusipaxup.weebly.com/uploads/1/3/2/6/132683367/ce694af45a318.pdfIn PDF document text
    • http://vojirumabi.22web.org/witizisavofal.pdfIn PDF document text
    • https://foxaxefaga.weebly.com/uploads/1/3/1/3/131398491/witurezeruwilezuxi.pdfIn PDF document text
    • https://wofixoxabovu.weebly.com/uploads/1/3/4/5/134524794/ee0b02e.pdfIn PDF document text
    • https://lorinifufa.weebly.com/uploads/1/3/4/3/134357706/8766717.pdfIn PDF document text
    • https://kisagisetiduke.weebly.com/uploads/1/3/4/7/134762251/dacb26d9c682.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/modaritalum.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/avena_beneficios_para_la_salud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_b703b11eb29c4856a67fb1ce4d4f00f9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/accuair_e_level_touchpad_mount.pdfIn PDF document text
    • https://2178e3ec-2e0a-46e0-af35-d8a6fdfeb21a.filesusr.com/ugd/c411cf_25d7b974b1d949b18086eae2cb9af504.pdf?index=trueIn PDF document text
    • http://raziwisubuza.rf.gd/ti-30x_iis_convert_to_fraction.pdfIn PDF document text
    • http://robajev.rf.gd/gezowunonadugu.pdfIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_82faf1db83b94942913c7bcf7f63ca20.pdf?index=trueIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_39ba9447fa3b405cbc9bd95a269b8a6a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/10139840057.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/align_text_boxes_in_crystal_reports.pdfIn PDF document text
    • http://wugerubuvugox.myartsonline.com/48377698301.pdfIn PDF document text
    • https://b9264059-5ce6-458a-812b-58b21e0c51d1.filesusr.com/ugd/9a3dc1_074f0944dcf3423c99a591085482251a.pdf?index=trueIn 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_off000108db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DB 4908 bytes
SHA-256: 2fa38e11b7199b2adc865be9b747245e672eb8c0521fcf128ea5de7c1e896de6
font_01_sfnt_off0001198e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198E 11544 bytes
SHA-256: ea0bb143a178c13cbe5234e42e864c3189b25c071a2f06947bb27572dd72d744

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