Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e4127ed1b34e30…

MALICIOUS

PDF

78.0 KB Created: 2021-03-07 12:08:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ca35bb50f5313a853e1c4afe2ec0db4 SHA-1: b06881befd311daba5871bc043ea7d282363278d SHA-256: 99e4127ed1b34e30f9bf740a4035499a61cf6acd7cf90877ba2a1715b930695d
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to Weebly hosted PDFs, suggesting a link farm or redirection mechanism. The document body contains garbled text and metadata from wkhtmltopdf, but the primary malicious activity appears to be the mass distribution of external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/wix?keyword=s%2527io+credesse+che+mia+risposta+fosse+meaning
    • https://xokizaneg.weebly.com/uploads/1/3/4/8/134886830/wogurirotaxewop.pdf
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/lomuvan.pdf
    • https://cdn.sqhk.co/nomelafu/fhcEicD/rally_car_suspension_for_sale.pdf
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/wozolab-gitibofatu-fenod-zegatumixod.pdf
    • https://cdn.sqhk.co/kagurase/hizjcyi/63850344724.pdf
    • https://static.s123-cdn-static.com/uploads/4367937/normal_5ffb5264e08e2.pdf
    • https://cdn-cms.f-static.net/uploads/4447089/normal_603f88d737914.pdf
    • https://cdn.sqhk.co/zimidenex/cjrB11f/dexalupisepakar.pdf
    • https://cdn.sqhk.co/nupasoxure/jhawjeW/gojovupusegazawa.pdf
    • https://zodovamerevi.weebly.com/uploads/1/3/4/3/134316438/xijadenojir.pdf
    • https://cdn-cms.f-static.net/uploads/4455390/normal_603808d330c64.pdf
    • https://tetegewa.weebly.com/uploads/1/3/4/7/134761184/nilupezevakuzesevalo.pdf
    • https://static.s123-cdn-static.com/uploads/4427780/normal_5feb31f25abf9.pdf
    • https://static.s123-cdn-static.com/uploads/4476927/normal_5fef46666796f.pdf
    • https://cdn.sqhk.co/mozigizax/hdCjcih/slots_casino_jackpot_mania_free_coins.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dukajevo/tawuzewebenamikeneb.pdf
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_86a7ff2173734b81a9a563543e7d149e.pdf?index=true
    • http://bogetozepopizir.rf.gd/podifosusanufifofuve.pdf
    • https://s3.amazonaws.com/xiwevitox/cant_turn_off_x1_box_with_remote.pdf
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_a42eedce165545e5bd40872b78ebd34d.pdf?index=true
    • https://s3.amazonaws.com/suxuzubojut/large_mardi_gras_mask_template.pdf
    • https://s3.amazonaws.com/dofufiri/english_lessons_questions_and_answers.pdf
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_3be1fa55056c4f6689333879e07d8201.pdf?index=true
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_5969006a9b1a4e5989899aa6726ce165.pdf?index=true
    • http://vezenupu.epizy.com/vomuzonekabimelaj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3db.bin
20d00be02d2d728babb5088da1b91cded070023ba8e7690d21762de4bf7cb723		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DB 5460 bytes
font_01_sfnt_off0000f63a.bin
7391535fb13018412b58984340506d59c2fa9d6de5ad7c51658594267d27525b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF63A 12088 bytes
font_02_sfnt_off00011c0f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0F 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.