Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef735e95539d3b9…

MALICIOUS

PDF

88.7 KB Created: 2021-08-05 13:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 31304551b43a589d7482234493ee1091 SHA-1: e1881164d121f13fca5d196905485ba3c22cc7f3 SHA-256: 2ef735e95539d3b91a2d9ecac39c36e6d52cb6fd176e003411fe718a2616e4d8
154 Risk Score

Malware Insights

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

The PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. No scripts were extracted, but the structure and URL patterns strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8866

Heuristics 5

  • 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
  • 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.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a413b7c4b---5554819496.pdf In PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/2638fc031a355257ea84cf7122ba1a01/gajuvomomewiterosi.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fa1b199078d---vawuzur.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/141000404305.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/ecf9ftm5meq06jjjgtd6jgqlnc/nixazezijiju.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/m3cklao8e97nl0npqgis7vqu7i/74054224357.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/43894475211.pdfIn PDF document text
    • http://inse.us/uploads/images//files/muroxovovesubexag.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/99ae6b9682c21049139be35fc66c8fa0/55550339430.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/76010935659.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/epu0b3a7ig3eoocn0ctfdre86l/dapudufigaladubepukimev.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd57a377a3---fiketufiline.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/53268723571.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae101e3b46---lubenoluxafixorolok.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/83724800974.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/47936294258.pdfIn PDF document text
    • http://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/56225362110.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/01e89a8dba3c9a7035c336218d1937ef/46346800086.pdfIn PDF document text
    • http://taskentcompany.com/userfiles/file/96714569033.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161005f5e47984---botudejuvigirexofejar.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/94178242762.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/59160a92b08e814c39591c78be5b68f0/31586771346.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b27b9241be7---57165677515.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be44fe61bca---84605765592.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=samsung+s7+edge+bootloader+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF316 10952 bytes
SHA-256: 5d2e91ca49dd654f2a4a2d8b02faed95c947e3cbc5114cf7fe293adfa7411a3c
font_01_sfnt_off00010c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5B 16340 bytes
SHA-256: 88a5f3ad9079b2340172ecd64f1cd79ba1ad1753eb2b73e58de10c5a7be67d15
font_02_sfnt_off00012252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12252 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A64 17340 bytes
SHA-256: ee8e81c08135168634b5669a9bd3f0b2c099d6df5744d3fc9344b6497294af30

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