Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c36613bf4dda089…

MALICIOUS

PDF

90.7 KB Created: 2021-09-17 17:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5db5804190d485f6a60214a2b117244f SHA-1: ceb27382ce619ab1dbd24fa17017bc63cf7d0355 SHA-256: 7c36613bf4dda089f9d8a46bdb4dc4d953ee3179aea00538ae26e360d1fa272a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this is a link farm designed to obscure malicious destinations. ClamAV detection and ML classification confirm its malicious nature, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://catamma.ru/uplcv?utm_term=2+bhk+bungalow+3d+plan+with+elevation PDF link annotation
    • http://brukikostka.pl/uploads/page/file/linixemelopizot.pdfIn PDF document text
    • https://newfrio.com/userfiles/files/lovew.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/netijebenekelexelu.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/sosanad.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/wixawenateved.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/kagopi.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/rapokimufoxalanevudew.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/28611452319.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613349c60fa37---84296241680.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/24245095611.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/nujimefenilisaka.pdfIn PDF document text
    • http://wwstationery.com/files/file/loxozajelidatamubogurazer.pdfIn PDF document text
    • http://mfo-fond.ru/ckeditor/ckfinder/userfiles/Images/files/wakudepogorofilej.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/49517146582.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/35301672246.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/kojotasijalofiziluzujo.pdfIn PDF document text
    • https://iword.de/userfiles/file/dorikit.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/68056178450.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/mikadiboverukobupavitizo.pdfIn PDF document text
    • http://physocare.com/Images_upload/files/lufufowewem.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/56044655013.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/fupapiluxologo.pdfIn PDF document text
    • https://activepymes.com/pub/file/mupominunorajevalofug.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_off0000fcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB1 18332 bytes
SHA-256: 745206264caf6bc7607d3cb23fb3c1405abe1ba1e1f2d1228004e58565d2f0b1
font_01_sfnt_off00012c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001442c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1442C 11084 bytes
SHA-256: 78c418ad4370a158d2cb04ec1eca28c5b3f15fcca609928d4952bd11596f9606

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