Malicious PDF — malware analysis report

Static analysis result for SHA-256 f007c7a200df0f4a…

MALICIOUS

PDF

81.3 KB Created: 2021-09-13 18:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a269744b7532edf19ecd90ba296e4169 SHA-1: 89c2526ebbe25c7057c3fd1dbd4ceabd84c0f041 SHA-256: f007c7a200df0f4a5539f278ea88ec0506f11987b06a3460e7997d5869b87139
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also references numerous external URLs, many of which appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=miroir+android+pc PDF link annotation
    • https://dienhoanghean.com/upload/ck/files/vuzitixamowumile.pdfIn PDF document text
    • https://vr-spagna-20.effievirtual.com/galeria/files/75273192646.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/kofumolulujozab.pdfIn PDF document text
    • http://shriramashramssschool.org/userfiles/file/numafufuligo.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/14117177989.pdfIn PDF document text
    • http://importfoodfair.com/userfiles/image/2021/09/file/tubaxo.pdfIn PDF document text
    • http://inteko-tula.ru/f/file/48208312971.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/zerudupupotirog.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/savabogibav.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/xudimunikukixikuxanital.pdfIn PDF document text
    • http://fundacjahfg.pl/upload/file/79806549052.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/35756658905.pdfIn PDF document text
    • https://beaszemin.com/files/gokes.pdfIn PDF document text
    • http://fxmeat.com/upload/file/f67751b5b875f2e4fc5548795ea91bc0.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/vizulisirixepiwavewir.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109122215273506.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/37646158652.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e95b62121e---diderajepetukugizujefevof.pdfIn PDF document text
    • http://bushurov.ru/images/files/79777343884.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/5139643615.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/golowotesuvutadizur.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/palowudanevu.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_off0000dccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCC 10056 bytes
SHA-256: 49b04b907f6c27e24b021f55fc79a36da149bb9d535f3b46f32b35cae4d101f9
font_01_sfnt_off0000f32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B41 17464 bytes
SHA-256: d8b11134d4fcca42bfb7d327b158eceb0842209103fe2591628294e28d49968d

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