Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e311a1c684417e0…

MALICIOUS

PDF

72.6 KB Created: 2021-09-19 03:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8e8e148d3b6e583178dc1d0515751132 SHA-1: 849ead55805fde8989f8eb4866ad13284e5be298 SHA-256: 7e311a1c684417e08bcd60204f3a167722c647213b8376558421e8f858d0862e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model with high confidence. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of JavaScript suggests an attempt to execute malicious code or further obfuscate the redirection process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • 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://catamma.ru/uplcv?utm_term=mugen+train+sub+online PDF link annotation
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/75713c3c732efd580ed49518dcc21a92/65962180886.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/vokusosojogenixolo.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16140be44af78e---83396818285.pdfIn PDF document text
    • https://dichvuketoansg.com/luutru/files/nuxatujufiribeze.pdfIn PDF document text
    • https://qwert5.com/psum/admin/userfiles/file/44694083048.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/kitirizaxababibusibonevud.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/30108909806.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/6700438901.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/81667801863.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210916_AD8159CBFCED0A86.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/gepov.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/38131252350.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/dubovaveb.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/nigogisozawegojevore.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/83949226792.pdfIn PDF document text
    • http://szigmetal.hu/editor_up/jajube.pdfIn PDF document text
    • http://diagcorlifescience.com/attachment/file/folazumo.pdfIn PDF document text
    • https://quasar.mago.ro/ckfinder/userfiles/files/72406762105.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/rumezonoti.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad51c67f13---51868111221.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161465e00d33b5---50063007897.pdfIn PDF document text
    • http://neza.cz/UserFiles/File/nodubapalotepejidib.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_off0000b7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDB 10516 bytes
SHA-256: a64c571d312413f13028c67c5a8f79a8ad9533473de07042960696ec675af4b5
font_02_sfnt_off0000e7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E5 17564 bytes
SHA-256: dc6bc194cd2d580b5ca43b1add5f22eeb8bc3bbca755eb02ebe88bc638bdc6c2

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