Malicious PDF — malware analysis report

Static analysis result for SHA-256 15eded6d71f14207…

MALICIOUS

PDF

110.0 KB Created: 2021-04-15 15:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a53cd69cf79243ec84fbeefca9cd34d SHA-1: eb3e5c68c09eafbe9525a1da31c5373e1d24cab7 SHA-256: 15eded6d71f14207718ab363b60fd53c05a8160923ca1e1d9d0d7634d19adfac
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with one heuristic specifically identifying a 'PDF link farm'. The embedded URL 'https://ponafet.ru/strik?utm_term=memories+bring+back+you+lyrics+in+spanish' is suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

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://ponafet.ru/strik?utm_term=memories+bring+back+you+lyrics+in+spanish
    • https://cdn-cms.f-static.net/uploads/4463791/normal_601795be27ae1.pdf
    • https://tatefazaseg.weebly.com/uploads/1/3/4/0/134016926/tiwagelaru_kafixexagoz_gezus_nipizalevawu.pdf
    • https://fivitilanafime.weebly.com/uploads/1/3/5/3/135395402/fisid_korojumus.pdf
    • https://mekuzawejonoma.weebly.com/uploads/1/3/1/6/131606345/a9c270daa.pdf
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/gogox.pdf
    • https://static.s123-cdn-static.com/uploads/4478123/normal_5ffa95646bd8f.pdf
    • https://bixolajulepu.weebly.com/uploads/1/3/4/7/134746591/6212069.pdf
    • https://fewabupa.weebly.com/uploads/1/3/4/5/134584226/595f1292d3ffbe.pdf
    • https://tobalewaluwe.weebly.com/uploads/1/3/4/4/134437424/5325485.pdf
    • https://dowizipolejufu.weebly.com/uploads/1/3/0/7/130775784/2613341a4ed2c2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/6609ff5d-24e9-46ea-875d-0dadb5178d3b/buzuwi.pdf
    • https://uploads.strikinglycdn.com/files/d58e14da-bc08-44f1-882d-015e3fe1b28a/zufekafugaso.pdf
    • https://uploads.strikinglycdn.com/files/650ec868-fd03-473e-8e98-a63046934228/93675216871.pdf
    • https://uploads.strikinglycdn.com/files/6540302f-e85f-4c19-b822-5ea599c3ef7b/rug_doctor_dcc-1_parts_diagram.pdf
    • https://uploads.strikinglycdn.com/files/516f6ccb-fc10-469f-9f19-8b82116f8086/nonisuvi.pdf
    • https://uploads.strikinglycdn.com/files/916a6e93-93a5-47bb-8be5-119a5cbf4edc/oreck_xl_hand_vacuum_manual.pdf
    • https://uploads.strikinglycdn.com/files/5650d800-fc74-425f-9eed-c51a089ba9f3/73281770162.pdf
    • https://uploads.strikinglycdn.com/files/898d5057-17d7-449e-b79a-f54b3d70ba52/36309774387.pdf
    • https://uploads.strikinglycdn.com/files/5658638b-e1c1-4993-a11a-75312f685ba6/genie_garage_door_status_blinking_green.pdf
    • https://uploads.strikinglycdn.com/files/a522a14a-3da2-4456-a222-460829299df1/que_es_las_purinas_y_las_pirimidinas.pdf
    • https://uploads.strikinglycdn.com/files/91e2d64f-0f9c-412c-9e4f-fe9b06f607c1/dobuxuz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001500b.bin
a9879f94c3de0370bbf099cba19345659fa3e7eff91fdea10569de354856d757		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1500B 3136 bytes
font_01_sfnt_off00015b41.bin
6f7572dc5bac7347cddd98f38118d0f2b97c5ad7e20afb64bbe814cce95faca2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B41 5460 bytes
font_02_sfnt_off00016da9.bin
b959d0939ba445c190545833af2ba4105df9feb644dece691d321135bd836b07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16DA9 15268 bytes
font_03_sfnt_off00019a55.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19A55 4324 bytes

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