Malicious PDF — malware analysis report

Static analysis result for SHA-256 81ea9ba49be35140…

MALICIOUS

PDF

75.2 KB Created: 2021-03-14 19:09:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a6cbb37d59cd336d3a7931006aaf752 SHA-1: 51f2630b695a59719316a61450066cbd7473f558 SHA-256: 81ea9ba49be35140d7f17ebc67dc68bf4ac4cf607b58a02a27bf959ca8fce218
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs, one of which is directly referenced in the document body as a lure for a 'Nacho libre cart for sale'. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://kuzutuzo.ru/wix?keyword=nacho+libre+cart+for+sale
    • https://tejikapor.weebly.com/uploads/1/3/1/3/131382395/9056630.pdf
    • http://iranianvc.com/60931374252nh31e.pdf
    • https://cdn-cms.f-static.net/uploads/4426062/normal_5fe7e628369b0.pdf
    • https://cdn-cms.f-static.net/uploads/4409096/normal_601a01223c934.pdf
    • http://bestplacefor.rest/hymn_to_freedom_oscar_petersonc7vin.pdf
    • http://form-lnstagramverificationbadge.com/fokoxifikalovalinawpipl.pdf
    • http://hugertely.xyz/kufonund82j.pdf
    • https://cdn-cms.f-static.net/uploads/4486521/normal_5fd33e837505e.pdf
    • https://vewominejijisos.weebly.com/uploads/1/3/6/0/136053907/9116a7594d.pdf
    • http://taygerr.com/2260798127484836.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_86a615f730c54a93a246b43109fc5572.pdf?index=true
    • https://s3.amazonaws.com/rewepalazamiso/1571441202.pdf
    • https://s3.amazonaws.com/jitimesolagun/isn_t_it_ironic_worksheet_answers.pdf
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_73178f59c886476091cb7a17c635fc25.pdf?index=true
    • https://uploads.strikinglycdn.com/files/206b2c60-d505-4b38-a81b-241d722941e3/naxomuxupaguroxibebifajum.pdf
    • https://uploads.strikinglycdn.com/files/6637112f-8c93-4790-b930-b702a07d94aa/olympus_om-2n_repair_manual.pdf
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_25e75e81d58045dea6ec6729b9f46dcc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cf7ecafc-9814-44b6-9faf-1f1198228909/sazufotirivoxajosozulafab.pdf
    • https://uploads.strikinglycdn.com/files/c02bc36a-735f-4f5a-84f1-8238f14f1d34/study_quran_online.pdf
    • https://uploads.strikinglycdn.com/files/ca0e2473-b73d-490e-92ce-885b5643209c/inverted_commas_worksheet.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_off0000ea42.bin
b09317eb920cd987f02ef758562852297a117df097a42fa2b348dcaac9a62f8c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA42 5080 bytes
font_01_sfnt_off0000fb88.bin
5dfc76a6fa19c2a7cc5a2f9d1b7fbaf6d066aafe3513bdf1370e7242cfd9deed
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB88 10620 bytes