Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ed8eecc72ca2c2…

MALICIOUS

PDF

92.4 KB Created: 2021-08-08 12:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 00798f024d7d9fe87990c973445e2e56 SHA-1: f42ea2ce97cd502a3701f1fb2a2c5cb9690dc692 SHA-256: e2ed8eecc72ca2c2bd93c268d4c0a6c10b6927222a7a24ef9575f41152900ec9
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://philabc.ru/uplcv?utm_term=porque+se+tiene+que+sacar+la+muela+del+juicio PDF link annotation
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b058f90239a---30252435402.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/kifujonufiwunupiz.pdfIn PDF document text
    • https://micsys.in/userfiles/file/bapiberewi.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f98c7c6740---29780236968.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/74425771341.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/10b256f161e71e8be7c2583347b0842f/52355261306.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/woxexot.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/milobuvubosawuv.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/88q12e6ng0rse485sr8icj6v07/7312616768.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/72820428680.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad171497f6---sizum.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99d021a64---82920276701.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e4a557e9b46---75820666911.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/fojenefobidikosubutekisi.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9c062a7d3---4077181749.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/cf94ba158ba00dfa9e71338f40ab9527/gemim.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/36835065000.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/88702887184.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/2d1b94b0a43c59c80e6b6cf0d49d9e6f/mobuduvelili.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/21437291155.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/97069867687.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4388a37d9---77793671756.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_off000104ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AC 10908 bytes
SHA-256: add54426e4c8d578aa930c0321d33fac8fa2a3ea47c69a15f14a1ec06671a59b
font_01_sfnt_off00011dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAD 17260 bytes
SHA-256: 072541431e82fcd525423a6d0ff624be29e218c2730d24e57fee0fb02149297b
font_02_sfnt_off00014965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14965 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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