Malicious PDF — malware analysis report

Static analysis result for SHA-256 229e0cd048ec18ff…

MALICIOUS

PDF

78.6 KB Created: 2021-09-12 10:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 355c9e5a6e656950e7b024c465e6de02 SHA-1: bc3056255713d6d4f18de8821c216017cf969d76 SHA-256: 229e0cd048ec18fff40bec80a864bf529238d3064b6abc6239578da3628407e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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
  • 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 https://synerhu.ru/uplcv?utm_term=all+eyez+on+me+123movies PDF link annotation
    • http://szao-spb.ru/images/news/file/dedakugavudebevozekuzogux.pdfIn PDF document text
    • http://harlit.com/upfiles/file/taturimivi.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/55143719753.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613728ebeba69---milumuterivulat.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/vumivunasusarokamoz.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/49030376098.pdfIn PDF document text
    • http://azinsaghf.com/cache/fck_files/file/xudupaxevegusikedarunem.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/sozuvanutudixudufe.pdfIn PDF document text
    • http://www.grifin.sk/files/82536305511.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/80078195098.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/5e425542829a6af7e806e9d519a6c350/45406758281.pdfIn PDF document text
    • https://aecvfcom.nrgence.com/upload/userfiles/files/28728555815.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/xofositebib.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/nijuloxageli.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/7516ff823bb5c951d2452c426e054b2c/70843324503.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/4baddee453a3abcdddbe533318582acf/72378274663.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/zarolivatiwobemojowogenav.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/62515488189.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/18945016678.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/buzesonujefikegudapufol.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/26086675985.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138ea247998d---vitisotedilegelerin.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/fadupibezakexevurapana.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_off0000ce70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE70 10476 bytes
SHA-256: 494824e50e13dd300ccc13709a2c2f289f513bd04463ad2b1c8030de13c74db4
font_01_sfnt_off0000e664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE664 17888 bytes
SHA-256: daacc295b5f818d5f2db319abc7898108da1c1cfc92a2be3b327efe962825b86
font_02_sfnt_off00011518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11518 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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