Malicious PDF — malware analysis report

Static analysis result for SHA-256 df07366e1e03005d…

MALICIOUS

PDF

95.0 KB Created: 2021-08-19 01:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6c1662869493702765f49dc69f001879 SHA-1: 30d59971ffe0ee3f6bf823bcaa9c4ada28a1414f SHA-256: df07366e1e03005da7593f53300ce19a6ea9060f31901057a72d2bc4f60cc30e
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting it's designed to lead users to malicious content or downloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a network of links for SEO manipulation or to host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://smidgel.ru/uplcv?utm_term=what+are+the+three+main+tenets+of+cell+theory PDF link annotation
    • http://sushiosushi.com/uploads/files/loxojebafu.pdfIn PDF document text
    • https://digireg.at/upload/bawegixutepopagibaloxusu.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/mejurotudosunonejudo.pdfIn PDF document text
    • https://schmitz.cz/res/file/75200244989.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b538550c6---29063681026.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608241042a3ef---dufep.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/dp1ivfp6hvrbi38r5113i9rce3/94614801808.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a23e81eb27---82384957607.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/15552203782.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082455a2e2b3---48977951797.pdfIn PDF document text
    • http://falerisztika.hu/tmp/xenur.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/98940963106.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/r0idibj6266va1kjpn4u36dg0t/tewama.pdfIn PDF document text
    • http://busanpc1.com/upload/fckeditor/file/88631829480.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090945663e8d---29847730613.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/pirewikiwepateko.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c85336b2b58---82144344504.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/sllbfrmq63ukhj843b8o07of48/38007281260.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/09c84dffecf666e823f1cf5d0adac3cd/99340707981.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/zukeparipumodufifebide.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/fatixarugalu.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/95181286078.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/6f6a15d60e436fa96b0d794de13677a3/68822520290.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_off00010ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFA 17432 bytes
SHA-256: 91a982237575a7f9abedcca4e6007f9c36f6540ac2d344dfc4f767aefb5d27bc
font_01_sfnt_off00013cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAB 10708 bytes
SHA-256: 4638ab33f13195e99f09c634f18f777b4609f2e633a51e11765aa336e0593091
font_02_sfnt_off00015520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15520 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.