Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a69c195be0fb37…

MALICIOUS

PDF

86.0 KB Created: 2021-06-11 07:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: eb314c502a3bf5df9197aabba1eaa776 SHA-1: e815bf8b6e6194b67f6d96272633590a311ebc73 SHA-256: 78a69c195be0fb37e3d725ae64c4de25296ff90973911318d7ac5b056bc236c3
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/uplcv?utm_term=ek+mulakat+mein+baat+hi+baat+mein+song+download+mp3 PDF link annotation
    • https://itracmediav5.com/ckfinder/userfiles/files/xobugekojojel.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f8671b4dd---fujerufamitubumugawusu.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/dilozibudozatagi.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fb5cf1531---mizuwadididozuwogarifizas.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/sojudeleroxevibufed.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bc5ff0dd3---vixalajevodalub.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/raputika.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae85bec524---38973769400.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/23572561716.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf1c3b78b4---84790649503.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7dafb47e0---votomijogukiniropulim.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/5bf700c373d04dfde1995aab773f7092/13730116501.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/a2a852f79bc790725ea3368537e1cec2/kufavogafaguvodur.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/b53ae4cae934d834c9904fb03bcec2f3/78106175713.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e8ebb7ffe---60594316782.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/81828832890.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB4 5696 bytes
SHA-256: ea611e1b791746d9e3a00895b89acb3f25afe4a2313809336089e42d5db3c229
font_01_sfnt_off00010103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10103 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00010c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C66 11100 bytes
SHA-256: 2880368756aca9b88c427e9e8932c6880094d131d05e5c41b5c3b60df9d54cb1
font_03_sfnt_off00013272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13272 7004 bytes
SHA-256: b341af288b3ddd4c06c02ee53eaba6591e55ef781f81de5eda39fa6b94c329c7