Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde3862da89a6df9…

MALICIOUS

PDF

64.0 KB Created: 2021-08-30 22:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 14f8d790ee26bba6f542ed9652ac6023 SHA-1: c6feb1f8037d596543791494a550ba042e0a4b92 SHA-256: bde3862da89a6df9f7adf4218019654f26b5b24839814f19c24f9b58e4ab6490
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging the embedded JavaScript to facilitate this redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8402

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.
  • 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
  • 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://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/puvasasem.pdf In PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/ei2gprn13sp7tbfksk2rub8dq1/ramavoxiwapo.pdfIn PDF document text
    • https://cowik.pl/upload/33262192409.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/84964663728.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/87311461929.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8f58575b7---sunejifevitojob.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/88508943598.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/dipagivodil.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/91406803067.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/83951706703.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/rukiwozulubenagurifixoja.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/65882568825.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/lojunenariwojixavasomok.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a0a51f371---bumitedepawoxudonok.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/soligupiz.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/zeluj.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8563e2b31ced498e57580296658256ca/dumemajun.pdfIn PDF document text
    • http://lechioutdoor.com/userfiles/file/38406628860.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/701276720fa5270b7e34045e7a5e99c9/tipipotobu.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/23474577269.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/447ad7486e9966cf8f990a513beb747e/supazusajupajunagek.pdfIn PDF document text
    • http://trivio.it/userfiles/files/57174065494.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=bibliography+and+the+sociology+of+textsPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/02cab1e616b88843268eaf2e4b4bcea9/5310825017.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB63 11308 bytes
SHA-256: fa241c001944a46be6805ca219b2a8069287bb4706fd6c1adfa52f4e4ca9e453
font_01_sfnt_off0000e58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1