Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e1ec468cebf522…

MALICIOUS

PDF

98.6 KB Created: 2021-09-23 02:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9473cb1ac9fcdd6c0a47134fff01fb3d SHA-1: ca5428b1826fb293a6c7d7c8ac430454417b7413 SHA-256: 94e1ec468cebf522a43acc9956345f701e4bdfc6c229c91c9c0a8ba568805c51
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms or disposable domains. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://whipitleather.com/userfiles/file/96317613051.pdf
    • https://thebottombillion.com/business_school/uploads/file/kajafugen.pdf
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/gukusivifapifu.pdf
    • http://0575zl.com/userfiles/file/wuvutonew.pdf
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/55733610172.pdf
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/daraxujodezuzowit.pdf
    • http://lerucherdesanges.fr/userfiles/file/tejukolozadevubi.pdf
    • http://realfootball.gr/userfiles/file/40884819365.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/b2b635db3c258e9498f90844afbde529/fetigizokiponuvajogepewa.pdf
    • http://novena99.com/uploads/files/202109062145238349.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134378320b8e---83033936559.pdf
    • http://vlajkylevne.cz/UserFiles/File/pimabagatop.pdf
    • http://bantinnhadat.com/users/files/83045561600.pdf
    • http://dzirerealtors.com/uploads/pisuxosejipaxiripipejus.pdf
    • https://rallstarawards.us/nbloom/fckuploads/file/35016768888.pdf
    • https://omprintandpack.com/userfiles/file/katazosulo.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0ca3bb80d---95468896914.pdf
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/wedesefosadeli.pdf
    • http://songhandiban.com/uploadfile/file/2021092300210173499.pdf
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/fupevokezo.pdf
    • http://www.farimar.pt/imgs/uploads/zuvasazo.pdf
    • http://contua.org/userfiles/file/83005516415.pdf
    • https://jamurgoreng.net/contents/files/gukaweforajogimaro.pdf
    • http://osteriailgalloelinnamorata.com/userfiles/files/zafidewibasurej.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=instagram+tools+free+followers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • 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_off00011a2c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2C 16792 bytes
font_01_sfnt_off0001323e.bin
708d93e2693cbb7e48456b5d76bf9e7b77c2b957d9c81e7b6dcd5421f4c5f23d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1323E 19140 bytes
font_02_sfnt_off0001645b.bin
c9cfaef3ff6f23de6d57e5edfda93ba8746db030bf96c0a6b17cf5ddcb871721
pdf-font-stream PDF embedded font (sfnt) at offset 0x1645B 10500 bytes