Malicious PDF — malware analysis report

Static analysis result for SHA-256 8beb3e253a2e7ab0…

MALICIOUS

PDF

83.2 KB Created: 2021-08-03 02:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b23c25ae06ec10b7aaa2da80b73abc0e SHA-1: e368c449ecc020c8827f15706920f58cb5925824 SHA-256: 8beb3e253a2e7ab01965b91a3815fd282c01abde0916940767f3f7350a46e0ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm hosted on compromised CMS uploads, suggesting an attempt to redirect users to malicious content or downloads. The presence of multiple unknown URLs further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9433

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://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/53185425367bf895b49636bd7ad2e664/37008992436.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/8r4li1pniksna2d9qn4bebf0ru/7280029151.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/7n5cfehvfvt1hgg51oror6qdd0/fejusetef.pdf
    • http://cascinamana.it/userfiles/file/vijejin.pdf
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/xutodez.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/8361fe630d6c979c9b596d04ac1f1549/51089247118.pdf
    • http://afghansolar.com/userfiles/file/vitusel.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/4qbac1pcc8ev5hv9npoaeghm9n/sisisufep.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca31f9003c---26831341997.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/60154626869.pdf
    • http://championshipsportsrings.com/clients/23492/File/gopatosorez.pdf
    • http://indago-rovigo.it/userfiles/files/86468671978.pdf
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/mijowon.pdf
    • http://sieuthikhoacaocap.vn/upload/files/bujobu.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8d08e708d---karibobekiponu.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/b8d4629d664e9028d341f50f14e6364a/lukataxakov.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/06c45e4c9662921b3a97786276927cd3/14331743709.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/9gntmvv0f9pinb1gdne70g04ql/36809475183.pdf
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/80230251223.pdf
    • http://edu-family72.ru/content/images/uploads/file/94784319941.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/be5d8c467532b9030a51ac798534b23c/netesimitul.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/59681484a89f4dd3b7452c020ee5ab4a/walitel.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=euro+truck+simulator+2+mod+bus+indonesia+apk+revdl
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa7.bin
d37dd55ab9272158c417900731edb40e445c88ad9e81a91be3b0d5afa7537eca
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA7 16704 bytes
font_01_sfnt_off00011b26.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B26 16792 bytes
font_02_sfnt_off0001333d.bin
0223a11ca1a00a4a43b26cca97486d064704bdeae9e78f57ff3d10c07ef8b485
pdf-font-stream PDF embedded font (sfnt) at offset 0x1333D 11176 bytes