Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e698a1097906e3…

MALICIOUS

PDF

77.4 KB Created: 2021-09-20 22:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5e1f5e229576281805b0c11713bd0bdd SHA-1: dfa08086b6bd92b2fc89889a7692dfc6f2098e09 SHA-256: a0e698a1097906e3af77a23569f0070f7d259db661a6dbcf073fcaeeb04383db
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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 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://allytemp.ru/uplcv?utm_term=how+to+have+cp+in+cod PDF link annotation
    • https://guadix.co/ckfinder/userfiles/files/wifosunonogawi.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/18248921675.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/dorijudikomewenogoninu.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/xagalifikoxasijaguduvoxip.pdfIn PDF document text
    • http://channelletterguide.com/ckfinder/userfiles/files/12674284903.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/mavetalulalubinuzu.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/37178269844.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/19688997613.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f1300bf39c26bd453351a4e377e6c40d/gokegexoda.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/pefaribizidomejoga.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/jinusibetosozavorumu.pdfIn PDF document text
    • http://runo34.ru/attachments/file/kofopopisevaxiradiwatojad.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/pugexetedusolodiwumu.pdfIn PDF document text
    • http://delve-cr.com/uploads/88800034036.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/70016218595.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/pugimifa.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/vazorobe.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/87920011249.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/0000d6223a116d007ff358e06242cbad/kilixavewet.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/59657659714.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/fababakazitafasilifepimu.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/46763689863.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/71810537769.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D1 16288 bytes
SHA-256: 6a93b3aca7ad1e55555503e505235f983c4900e6b961a857ad3e54061a3f6bb3
font_02_sfnt_off000110f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F5 10440 bytes
SHA-256: 9ea7588688d910724eec8d7d42485767b9620ec7df1e47b56958d167ab494500

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