Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed408039d06fd08…

MALICIOUS

PDF

92.1 KB Created: 2021-07-31 21:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f22ad0982eaf7b49c4efea325a3a75b SHA-1: 09b9cdcd3c85555110caba18d84afca3b64f4456 SHA-256: 9ed408039d06fd089d408cd136eb81f9b720656aaa1b123948f1e8f1a0e76755
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URLs, many hosted on compromised CMS platforms. This indicates a phishing or malware distribution attempt, likely using the JavaScript to redirect the user or trigger a download. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=the+adventures+of+tintin+full+movie+in+hindi+hd+download+300mb
    • http://helderlive.nl/ckfinder/userfiles/files/zewud.pdf
    • http://belhavenhighschoolalumni.com/clients/13962/File/xetawiwutisomulapudi.pdf
    • https://carlojans.com/cms/file/xomojesakeburojofed.pdf
    • http://infrabud.eu/fckpliki/file/42648687159.pdf
    • http://hrjok.com/uploadfile/file/41373081666.pdf
    • http://nissanotogovap.vn/uploads/images/files/zakebirelegamawubiwifuk.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/9148eac1c8de45878e37962b538446c4/45451569506.pdf
    • https://nanosoft.mn/images/content/File/19295905483.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/1f3d09c1af9dfc96844263c0a99431bf/romopomewopaxabi.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/4dour57u8qmosv58qvr199kp05/71215268952.pdf
    • http://mistralizmiryonetim.com/uploads/file/detevijom.pdf
    • http://radfordhsclassof1970.com/clients/878146/File/62180558732.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077a871166c2---69162787550.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083112f6fb9b---83679163288.pdf
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/25484560564.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5e2c9e72a---pajamemomeveleralizinu.pdf
    • http://to-kajihan.net/js/upload/files/55373514001.pdf
    • http://veribase.com/E/file/kotifiloligipogamonobiv.pdf
    • https://beautyreviveshop.com/newerac2c/userfiles/file/tirit.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/8ad427196edcc5bec9becdb8e47615e3/67507985196.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/svrpp5dol11m5di9ebrhh228v8/42146152732.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a95d44964c---40719913801.pdf
    • http://jkbprivateiti.com/userfiles/file/47595680841.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092719f8992b---65851619800.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 16792 bytes
font_01_sfnt_off00011ae7.bin
9f9e4e61b9ee7e68cfbb89e04b8c3c2f9445e95208e3a193bd6e12114ce28950
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE7 11268 bytes
font_02_sfnt_off00013536.bin
0f32b2b6f8f4ba24fb30d87b06f01628f584109f05efd83f4ff144be8d631707
pdf-font-stream PDF embedded font (sfnt) at offset 0x13536 16812 bytes