Malicious PDF — malware analysis report

Static analysis result for SHA-256 b746341ec2b4d136…

MALICIOUS

PDF

77.7 KB Created: 2021-05-27 05:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b564ba443c1775306ee995a8ad37f75a SHA-1: 57787d6339bb783506de903a0459371c9b754254 SHA-256: b746341ec2b4d136f3b6eeaaf8ab64254248f78ce888380e87d47940d56ddb47
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URL and the document body's question about redeeming Robux codes indicate a lure to potentially malicious websites. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/strik?utm_term=how+do+you+redeem+robux+codes+on+roblox+on+ipad PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427544/normal_606b50884656e.pdfIn PDF document text
    • https://lolidinol.weebly.com/uploads/1/3/4/8/134884516/kokirekisa-jutitigujino-tebikuvujaku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422884/normal_6033ffd401faf.pdfIn PDF document text
    • https://munulibur.weebly.com/uploads/1/3/4/5/134508804/582c1024752c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382770/normal_5fd8764cc0d4a.pdfIn PDF document text
    • https://pabibajezejav.weebly.com/uploads/1/3/5/3/135323938/3934924.pdfIn PDF document text
    • https://senuwisaf.weebly.com/uploads/1/3/4/0/134018119/sibobuzozabax.pdfIn PDF document text
    • https://lexeparuma.weebly.com/uploads/1/3/1/3/131380616/17541dc4.pdfIn PDF document text
    • https://mikovenib.weebly.com/uploads/1/3/0/8/130813447/fofowoxejo_damoje_suluv_gikuwemadoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420610/normal_601f1c0522b5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474759/normal_605f91c6a4590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459478/normal_603773d3c06e7.pdfIn PDF document text
    • https://jagewimaw.weebly.com/uploads/1/3/4/0/134012974/gopazilovu.pdfIn PDF document text
    • https://donedupefunesu.weebly.com/uploads/1/3/1/6/131607777/caa8ca6.pdfIn PDF document text
    • https://gebigimudixerez.weebly.com/uploads/1/3/4/3/134374499/nupobawaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461204/normal_604cf64293c86.pdfIn PDF document text
    • https://gisoroweri.weebly.com/uploads/1/3/4/8/134893792/zezumokukaxisogora.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487197/normal_5ffcd216772e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b83a921-883c-460a-bb07-bba285ca9b64/hp_envy_4500_printer_installeren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d0ea20-eb52-45bf-8acc-9334a1049474/how_to_install_chamberlain_liftmaster_garage_door_opener.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a0df92-8124-4367-81fd-67daf41c9f9e/peguseno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bdf7770-31a8-4388-8668-07681304aea1/resumen_del_libro_el_caballero_de_la_armadura_oxidada_capitulo_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/677e17d4-d4cb-4d37-8b19-b292825c333e/batazoxokofamipigevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8575a0a7-f586-4e76-b5a8-4e83c217bb99/garmin_nuvi_50lm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4426ab-4f4e-43fc-a577-6f6c9ce2ae25/jekodizupew.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_off0000f030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF030 5584 bytes
SHA-256: 26f066fed5e7b4c6483c2fec93f7cd51e232f6a7c15028f23d1fed2b59a65c34
font_01_sfnt_off00010326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10326 10784 bytes
SHA-256: 2d399ccdcd4e9a9d64b9eea7babb4b4055e6b03e001cda9172b30a7b88fa7387

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