Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad1501f5e0340fe…

MALICIOUS

PDF

70.6 KB Created: 2021-09-02 11:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2a81147fd10ca5153b4a57a6b5dee0f2 SHA-1: dd0d9c47b1c96db65d142835fb5e1317d8d401d0 SHA-256: dad1501f5e0340fe28ded0ce03cfaca73e88634d353b2d2953849f9b20827bab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 https://gikguamerica.com/userfiles/file/jimetijabom.pdf In PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d9fe22396---58563982218.pdfIn PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/1372865315.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/avlc1gs86k018s8j1inroqupg3/84065092463.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/23688061893.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/67759398790.pdfIn PDF document text
    • https://x-software.cz/data/file/jopiwepitogujenosusopal.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/69890646809.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/76dfbb9ef786847c9d9ecaa6e62b5151/fubige.pdfIn PDF document text
    • http://suseefinance.com/userfiles/file/48174599078.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1dc5e911---49301951863.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160941062e8d98---mutipopoleripufowofuruba.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/77108542357.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737beabe11e---20505489942.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16093cb9500196---62219821199.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/62659581274.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93bfd10484---pakaxuberaxigekopelamakar.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe8f0d0c53---woxefulikewu.pdfIn PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/katojifebopasorojal.pdfIn PDF document text
    • https://warungmimpishio2.com/contents//files/47956225885.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ee74c43e6b3---32758160850.pdfIn PDF document text
    • https://butagallery.com/userfiles/files/xipepaguluwuwimenul.pdfIn PDF document text
    • http://jouezadomicile.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/berovuzizabexivoxerabut.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/juwofemirawoguxol.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/78843628234.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=material+auditor+fiscal+pdfPDF 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_off0000b685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB685 10604 bytes
SHA-256: a9c3a1e8f63362a79d19b3371d2b40638eea59cdf23107bb4bd5fae572ed9a47
font_01_sfnt_off0000cee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F8 15404 bytes
SHA-256: cf1af84fd5f1041169f904896b3f17378cda1eed32ab105a1d6afcd15a6f83f9