Malicious PDF — malware analysis report

Static analysis result for SHA-256 7515c85cc963c7a9…

MALICIOUS

PDF

67.9 KB Created: 2021-08-19 15:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 23a7d9769a5716300669707daf45d41c SHA-1: c94e22c6a013441693e45441b7b12ae0c734e605 SHA-256: 7515c85cc963c7a9483d754fa65acad3622ca6bd6c64cc7d6aede34d21691168
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a Pdf.Phishing.Trojan detection. It contains numerous links to external websites, many of which are hosted on compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links indicate an attempt to lure users to these sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

Heuristics 5

  • 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
  • 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=troy+bilt+pony+blade+engagement+rod PDF link annotation
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b670ee7d86---95203011935.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/05e2d1242cf47390e7a40eca444fd8c2/segajafareguranonogomob.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3aa593f67---78886218327.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/26e73f472d2b64bdd492f541486dca08/36032897381.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/pr90q1elppvo08vtqjlssbdqio/21008424720.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/15777158681.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/dff90a22cd3022f96f64991f8a0d55a5/52448853546.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/77ec29b7fe3202eb564a08c099bef1df/mudejisefabikopokikul.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/mesimumutawasopuvuw.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/3833893463.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/45614597145.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/9869167624.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/37790172975.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/gofuzopakuxi.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/kusorafi.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/1106027916.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/zukifijamigul.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/43098143831.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ab7bb1fe7---xepepozukave.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/xukitefanawijej.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2119169e58---99782367155.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/41657581729.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/21030fe695afec0d6a6afad89503f409/bupolavukusejajejewakuw.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_off0000d00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00B 10784 bytes
SHA-256: 21a81a47d7c151704e31eb387acf70ac104d4506d88d5adacba9d32767839443
font_01_sfnt_off0000e866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE866 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1