Malicious PDF — malware analysis report

Static analysis result for SHA-256 522e514e52d50259…

MALICIOUS

PDF

79.9 KB Created: 2021-05-13 00:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f3219b870842c398b49e83ea26cbb09 SHA-1: e2cabb76f9d8f34ad24c9df4036d5e20367fe0b7 SHA-256: 522e514e52d502598f0c81589bb6b3a3b7b12c8cf0fdde0e74caa5b61ff0d4df
226 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, strongly indicating an advance-fee scam. It contains a large number of external links, many hosted on disposable domains, designed to redirect users to potentially malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The embedded URLs likely serve as part of the redirection chain to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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
  • 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.
  • 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://nipisod.ru/strik?utm_term=average+cost+to+rent+a+tux+for+wedding
    • https://toredakiwireg.weebly.com/uploads/1/3/0/7/130739366/950d9f4b3385.pdf
    • https://kazazurijufom.weebly.com/uploads/1/3/0/8/130814205/7297533.pdf
    • https://cdn.sqhk.co/gorubabor/ygdidha/60048428448.pdf
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/zevunavara_defalexokugu.pdf
    • https://lifoluzasodani.weebly.com/uploads/1/3/1/4/131437418/bagugokixoxol-jiwogam-xoxiwarikeji.pdf
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/dapagevo.pdf
    • https://teraxamexad.weebly.com/uploads/1/3/1/3/131380600/2919659.pdf
    • https://cdn.sqhk.co/tivinarafuvu/toge6u0/adults_coloring_book_online.pdf
    • https://cdn-cms.f-static.net/uploads/4485153/normal_606a80883e776.pdf
    • http://duvejiwuxikon.getenjoyment.net/modelo_atomico_de_schrodinger_postulados.pdf
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/2716751.pdf
    • https://cdn-cms.f-static.net/uploads/4425533/normal_604d0f7f22fd0.pdf
    • http://gidilakapajuke.mywebcommunity.org/dr._brian_weiss_libros.pdf
    • https://zovezeko.weebly.com/uploads/1/3/4/6/134697242/gafaji.pdf
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/lewude.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2978fa49-077f-489e-bef2-0e177375ffd3.filesusr.com/ugd/50ba8f_090b75f2ec554ad8bcf11def92d46f9e.pdf?index=true
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_587ccf9dda404d329564ed1842221458.pdf?index=true
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_e359c431669d4bd09142e770fb706e7f.pdf?index=true
    • https://db6a684c-bd73-4a61-997a-17040cc1d896.filesusr.com/ugd/bbbb20_42696c762c8147f1a81c0bb5e647fefe.pdf?index=true
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_5c5ae0d87bd249f7983efca8d164b7b2.pdf?index=true
    • http://rukosivujuxu.atwebpages.com/piwozodemanibejovu.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_off0000f780.bin
e26c8eb133a681a41845443638882813a78572b25fb2e385727c32d90234e493		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF780 5368 bytes
font_01_sfnt_off000109e9.bin
e01f2415eaba4a24a796a9445d86e557f6ae6130bbd11274e2503d1c1acbbbd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E9 11352 bytes

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