Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19f0c593a7e69ba…

MALICIOUS

PDF

70.9 KB Created: 2021-09-27 06:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 177bdddb417a809271a49fa919299842 SHA-1: aa8dea6ff3d3459992bc58ba0a32b49c6aaaacbf SHA-256: a19f0c593a7e69ba7fb5b8b7bcdf3d7b7be53ad86cc76ed3d8f4b34ce424698e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be disposable hosting or compromised CMS uploads, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://universalgroupautos.com/files/others/28237267555.pdf In PDF document text
    • http://maimungkorn.com/UserFiles/file/76345677904.pdfIn PDF document text
    • http://linker-apps.com/files/jilakexutigogowot.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/92851067964.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/31050663875.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/9fbdeb1fe78d325666ed29170025cc86/jedeliref.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gelevumodedudibuda.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/mibuxezavage.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/misegegosek.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/zirodakemopajilojile.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/20972945607.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5ac46d0ec---72220725685.pdfIn PDF document text
    • http://anm-av.de/uploads/files/fufufopaze.pdfIn PDF document text
    • http://fractinvest.com/uploads/file/bifizevaluroravimujoju.pdfIn PDF document text
    • http://119pump.net/d/files/98331501034.pdfIn PDF document text
    • http://vps73.juicy-group.com/editor_upload_image/file/mageligumisudonirunodafat.pdfIn PDF document text
    • http://importfoodfair.com/userfiles/image/2021/09/file/17842384533.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/36705045896.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/70721424826.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/kusovebobogovokuzoteguzex.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/8510230899.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/jefivofidikizugupa.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16147dd11b4669---82654049066.pdfIn PDF document text
    • http://tahyuh.com/uploads/files/202109011224182240.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/kepibozopevaw.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/xokuvoxobogajogikakofu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=download+my+city+new+york+apkPDF link annotation
    • 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_off0000b625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB625 15324 bytes
SHA-256: d7601f7f6ca1576c1d32553b4f4241920c9f6cf07606bb175d8d09b7def17234
font_01_sfnt_off0000dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF506 10800 bytes
SHA-256: a94f2da74ebd11e5bde6c406352c341f39310ce3b8c78e5f38b72a7212b5ed55

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