Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e75df9f57132cb5…

MALICIOUS

PDF

94.7 KB Created: 2021-07-03 00:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c356fa5325619dd970dba805c1cc8f1b SHA-1: 4c98197b2d667d0e5070b49256b8be1e5fcc6ce5 SHA-256: 7e75df9f57132cb51b2704c4f6e797f2e203e7e27cc2850841df99433c5373ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6774b830af---20865296608.pdf In PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/29952bc1e53fc70f5670280479f75f65/numabomamuleziwaj.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607089526451b---biragubapadikebobokamog.pdfIn PDF document text
    • http://darec.sk/files/files/mezala.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/terajatavobasiten.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/xerejawulidafogogigosijef.pdfIn PDF document text
    • http://corporacionnoa.com/UserFiles/file/nuwubevigaderabipimagusuj.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/vawowebikemoxesutaw.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160880793edeab---patosolosogugavemoti.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/9826b5932b359962b433c45e14a110c6/wodakuzirobazugofululan.pdfIn PDF document text
    • http://veivel.com/userfiles/file/susuxuvuvisi.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/gomopumujuzoxir.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/molerorusegeropulu.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/89879857847.pdfIn PDF document text
    • http://coxfamilyreunions.com/clients/5/56/566bc9ad745482f371977770c3e6b383/File/mowixuneduxunofalapuniwe.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/ce70452aff12d43e366093938a09e525/10201443875.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/515038935473b29f611bcee6a8a1bacf/sedimomaxunezexinogibu.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/29101295402.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/fuware.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0de593cd5---vubisefakes.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/2310199c24cc6144ccb44b368026268d/45050981535.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075772a82828---kofujajikogawakedak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=litany+of+our+lady+in+englishPDF 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_off00010da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA6 18288 bytes
SHA-256: 9e1893e7e0dca33bbdafdd62a29e6b19b91278848a45b31abe6cc31f0b27fb74
font_01_sfnt_off00013d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001553f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1553F 10804 bytes
SHA-256: 57673e0ed0f4cefaf5539272bc76ceaae1cc2e004002d218b8ca1eeb1d0ce863