Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da8beead8f44a32…

MALICIOUS

PDF

76.2 KB Created: 2021-09-02 00:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f06592b5036549a9863f2a55137872fc SHA-1: b8c4f1dd8909e0d0d0017531a96efb8ee37ca19c SHA-256: 2da8beead8f44a327eebf12369fb5267dc16c1229dc6cb4e74ddaf977008e63f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of multiple links to potentially malicious or compromised sites suggests an attempt to lure users into downloading further payloads or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5474

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 https://oilbasaro.com/web/images/ckfinder/files/20210729164341.pdf In PDF document text
    • https://successalpha.team/upload/files/wumiroz.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160abdf1b93ea4---dulimumoketixodura.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/59511171207.pdfIn PDF document text
    • https://pcetravel.com/files/file/gexarus.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/18744176572.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/1254437045.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/rukopabudisapen.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/83113929707.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/simalexufefofizepawawesu.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/62957871322.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/60899847016.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/gewovulikidetapaka.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/6ggnq1tt1oo0lkgfh4dpm3l1o6/25684446431.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/0b338c171c55e2635b81a02ffe6623ba/56160265678.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/fqpveitgpej5kbj28o4ls652hn/40441210916.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/24469096181.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/edcf34b70e4915263c00bb09c8d10761/82370705188.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/dodesinuramo.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/kafofabowesa.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1606e45fb075fd---94516841516.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/dikesuwajigunimuwuw.pdfIn PDF document text
    • http://polkovnik.su/upload/file/64241663432.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/84203820926.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=enantiomers+diastereomers+meso+compoundsPDF link annotation
    • 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_off0000e409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE409 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1B 18164 bytes
SHA-256: 7f5a9c57ec5c3a4641e8e45ce1e65c4b6ce7bc5c5cf54ab9a4c49fdc7c86459b