Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecabc46f66652d52…

MALICIOUS

PDF

78.9 KB Created: 2021-09-15 23:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 899a61d99fa1d23c0949185072a5c25c SHA-1: 09cb28247cc3c6d8d5d24f08755fae1a77e400bc SHA-256: ecabc46f66652d52cad406d5380bcd1c6d450698d94f4748c4caa6a466bef4e4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document used for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.2287

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://crewmak.ru/uplcv?utm_term=hungry+shark+hack+apk+mod PDF link annotation
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/givusawuwugoxowenazegegem.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60684884711.pdfIn PDF document text
    • https://aashianarealty.com/file/xuletikituvek.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/lomebewobugokosobilekez.pdfIn PDF document text
    • http://sergeisurzhin.ru/ckfinder/userfiles/files/44896312638.pdfIn PDF document text
    • https://ibericadearmerias.com/file/75851121636.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/tudimovar.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/53478959695.pdfIn PDF document text
    • http://cityfate.com/files/files/9913558212.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff454d0f65---posudaralavo.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/15433258840.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/jajipofotuzijitenozaporo.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/zuzisonexonixi.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/48652157267.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/wizove.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/97348381307.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/tetazuvatoraxuginik.pdfIn PDF document text
    • http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/57028864631.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/13232438971.pdfIn PDF document text
    • http://dayuntang.com/assets/uploads/ckedit/files/20210908091521.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/50767528156.pdfIn PDF document text
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/74848279653.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16135f1c0ce766---buvubokiwibolates.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613258cdc9d54---kikutopinuberarute.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/pabevasisazaribo.pdfIn PDF document text
    • https://hotelgaric.com/upload/datoteke/42494036459.pdfIn 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_off0000e13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13F 10888 bytes
SHA-256: 072787ec79f0506caa1d19658c9bcb94188f39a2d3d03a89b9a1b1d4e91063e8
font_01_sfnt_off0000fa04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11216 17044 bytes
SHA-256: 3a94ef80a2aebe2b405c06f383e8178510d5679dcefdf905fe407f1aa17a2689