PDF malware analysis — malicious · d19274a8aabc5fd5

MALICIOUS

PDF

81.8 KB Created: 2021-06-26 06:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 5052fd729db39a9c3361b1bd5226c570 SHA-1: 57b55c4f08e022b29e0a7047795e0f2bf695d64f SHA-256: d19274a8aabc5fd5f10f87f33213f93616091e0aaabb3670e1f2efba434eeff9

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The embedded URLs are likely used to host or redirect to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.5698

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://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/6f4128ee44549bf418163850995f6066/67270735851.pdf In PDF document text
- https://iphonerepairservice.nl/app/webroot/files/userfiles/files/sapane.pdfIn PDF document text
- http://studiotravenzolo.it/userfiles/files/sexixeresubevasevaxivo.pdfIn PDF document text
- http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b62d3523f6---bepigizusurujebuwadikimu.pdfIn PDF document text
- https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608173165b9b8---boxakej.pdfIn PDF document text
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc54299bdb---90944362460.pdfIn PDF document text
- http://wamer.org/userfiles/file/51376404485.pdfIn PDF document text
- https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/5fc077fcf0a8f9078dc0429894dc1092/4142781856.pdfIn PDF document text
- http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceee3a2740---raxilutobegizemazoxid.pdfIn PDF document text
- https://aimhc.com/userfiles/file/45066157767.pdfIn PDF document text
- https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/sujewafanolelefuk.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c84d891e6fb---gafoduganizumi.pdfIn PDF document text
- http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9928d59bb---jujibozeweditepo.pdfIn PDF document text
- https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/rqdfhgg725eds3orm1qujaea94/44466032355.pdfIn PDF document text
- http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c691da94fe1---680231430.pdfIn PDF document text
- https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/80e65db08c5d6b5a30c4fa52c2502765/91055514913.pdfIn PDF document text
- http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/tts419fq6smu3nubp40e81huo6/xonelunizuvetob.pdfIn PDF document text
- http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609627c638b7a---sujewapirovozizufupe.pdfIn PDF document text
- http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/7d88e9d0548bc551375843f7e6435dc4/34541635595.pdfIn PDF document text
- http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd2e173072---85092190277.pdfIn PDF document text
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/23rquqbnsijcq4uphk9lhbpq1j/vujifowokufoketadagexuban.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=organic+chem+1+reviewPDF link annotation
- 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f5ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5EC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010dfe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DFE	18292 bytes
SHA-256: `7cc26deb3a4de7afadb86cc4ca6396ae2f4746362b83884eb15834b4e21a95c9`

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