PDF malware analysis — malicious · 76dbb3269ce32eaa

MALICIOUS

PDF

84.5 KB Created: 2021-09-06 10:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: eb8f70df8aad22bc658d556c517f1390 SHA-1: ff8c27883c4ba25ea2c6aff16340073bd8ab7e12 SHA-256: 76dbb3269ce32eaac7aa708d86343398d2b9e1a0c5ef6b6957e98f3690f27606

132 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF document detected as malicious by ClamAV. It contains embedded JavaScript and a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are probably used to host phishing pages or distribute further malware.

Machine Learning

Nyx PDF Classifier suspicious score 0.4489

Heuristics 6

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.
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://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/gatapanekekazaxijubugade.pdf In PDF document text
- http://divyabodhanam.org/userfiles/file/tamabuj.pdfIn PDF document text
- http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/botorugusezosadegulig.pdfIn PDF document text
- https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/0603766941f99fc2d81f5f1d995092df/50098996009.pdfIn PDF document text
- http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ccda3316d---41764625774.pdfIn PDF document text
- http://cycling-software.com/files/file/89048707556.pdfIn PDF document text
- http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/kurawemafagopozifisox.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855e68dd287---57892240505.pdfIn PDF document text
- http://ithalattagarantibelgesi.com/resimlerfiles/38586430272.pdfIn PDF document text
- https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16087562beccea---65560195356.pdfIn PDF document text
- http://sgrappresentanze.eu/userfiles/files/72220694259.pdfIn PDF document text
- http://22vek-omsk.ru/fck_editor_files/files/66537144630.pdfIn PDF document text
- http://gaia-onlus.org/userfiles/file/jifube.pdfIn PDF document text
- https://learningsolution.ca/userfiles/files/sovewixiwexazuvavut.pdfIn PDF document text
- http://instant-image.net/UserFiles/Site/File/zedexub.pdfIn PDF document text
- https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/1a959481977c03c57a95a55400a810bb/32914898269.pdfIn PDF document text
- https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bacc1091365---41829886882.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/iqh5bton82c0nlr3vuitkbd129/bexeg.pdfIn PDF document text
- http://christopherdallo.com/file/gexejad.pdfIn PDF document text
- http://qtjdb.com/UploadFile/2021/05/12/file/20210512_123336_123.pdfIn PDF document text
- https://ptkas.com/kingkong/userfiles/files/71085587232.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0086ce4b3---37842291881.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=warhammer+40k+rogue+trader+rpg+pdfPDF link annotation
- 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f392.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF392	10920 bytes
SHA-256: `8ad75f76a373ef41eec722338f57da73e77903f4f88623914987db079769ed28`
`font_01_sfnt_off00010cba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CBA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000124cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124CC	18284 bytes
SHA-256: `ec73146c94737f281c45119c672dde2fe9e9c0fdab395d2df21baeb00656c693`

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