Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d0d8a353d1ab50…

MALICIOUS

PDF

77.1 KB Created: 2021-05-28 12:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1ff4d1dc3da00db243a71311e7ed9fd SHA-1: 1aa44bdd3ad462a2d09671ffe3c740c82e64db15 SHA-256: c2d0d8a353d1ab508620e0c8a6ec0de0d186e198796f21db6a46e12eb366dee8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is classified as malicious, exhibiting characteristics of an advance-fee scam lure. It contains a link farm of numerous external PDF files, likely intended to redirect users to malicious content or phishing sites. The presence of multiple external URIs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://druttle.ru/123?utm_term=certificate+template+psd+photoshop+free
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/bee80e9.pdf
    • https://xefufisemir.weebly.com/uploads/1/3/5/3/135393588/rekovivisesod_negulisexivur.pdf
    • https://cdn-cms.f-static.net/uploads/4412588/normal_6042088816d58.pdf
    • https://mixuvuweti.weebly.com/uploads/1/3/1/4/131483588/lulirubuwexenegi.pdf
    • https://xibatelilon.weebly.com/uploads/1/3/1/6/131637149/9429879.pdf
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/tafapunekuj-zawezixaniwa-wimop-sofulesife.pdf
    • https://cdn-cms.f-static.net/uploads/4484636/normal_5fd60a70493aa.pdf
    • https://fafovufurivu.weebly.com/uploads/1/3/2/6/132695925/01cae9.pdf
    • https://torovuzexas.weebly.com/uploads/1/3/2/7/132710592/01b31.pdf
    • https://cdn-cms.f-static.net/uploads/4458428/normal_601146c7bbf9b.pdf
    • https://cdn-cms.f-static.net/uploads/4425209/normal_6018d7bfbaca9.pdf
    • https://wixozini.weebly.com/uploads/1/3/4/3/134383912/fapiperagapaxodujo.pdf
    • https://jijubukaxujofi.weebly.com/uploads/1/3/4/8/134892288/kuwidema-xixekonuxu-zikedupa.pdf
    • https://kafaxidaduxeb.weebly.com/uploads/1/3/1/4/131438036/gesemagirigevak.pdf
    • https://cdn-cms.f-static.net/uploads/4421217/normal_60339c95d1496.pdf
    • https://cdn-cms.f-static.net/uploads/4393761/normal_604412b6352e6.pdf
    • https://ravuripuzi.weebly.com/uploads/1/3/5/9/135958818/musimibu.pdf
    • https://cdn-cms.f-static.net/uploads/4453891/normal_6029f16561dca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a5cd499a-aaa0-4db2-acd9-a6f0e3af3281/political_science_book_class_9.pdf
    • https://uploads.strikinglycdn.com/files/97caa04b-f2b5-46ad-ab45-b234aa96d5ea/43470702577.pdf
    • https://uploads.strikinglycdn.com/files/61f9a66e-003a-456c-99a4-2327d3c48a8b/pibebaxufabovinibuvuvepos.pdf
    • https://uploads.strikinglycdn.com/files/73e3d5b8-ed15-445c-b6f7-bd834e5ae9be/farebevikaxisuto.pdf
    • 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_off0000ef61.bin
00b5b389dd8b908cd27d8f2f1343fa8b014249ba2a389e09a7e3894faecc3270
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF61 5300 bytes
font_01_sfnt_off00010132.bin
ad9b0b08525a04cabfebbb92b2e8eedda1557de059b3dc0895667b5f666f3d5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10132 11112 bytes