PDF malware analysis — malicious · cb51e1e8a3331c78

MALICIOUS

PDF

71.7 KB Created: 2021-09-07 17:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: c60c933382fbc85c4122c9073d3993e1 SHA-1: a93485a269ae2a43533234c7fbdcbb610a46744d SHA-256: cb51e1e8a3331c786f90c4f91b208126214ee8dc082fdabe16f67a0c8ba72add

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier suspicious score 0.3973

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://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075f0f9e75c9---62728690704.pdf In PDF document text
- http://hainescentreasia.com/images/file/tibukuko.pdfIn PDF document text
- https://cvsc.co/userfiles/file/32195315716.pdfIn PDF document text
- http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/sadefasuruzaxavapiwikal.pdfIn PDF document text
- http://amandamaitland.com/images/file/86925500340.pdfIn PDF document text
- http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fa4aa7ee3---vigupomasuzegume.pdfIn PDF document text
- https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/eql5q2i0lv334m5p9ck0p2m1o7/48972006494.pdfIn PDF document text
- https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/30882bea43273efa141af3b905925532/fuginumotexomip.pdfIn PDF document text
- http://soft-pro.hr/upload/datoteke/dibapegafeto.pdfIn PDF document text
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fd280b7e8---45785826664.pdfIn PDF document text
- https://dermatologie-chamonix.com/userfiles/file/77064392840.pdfIn PDF document text
- http://thaoduocquyhiem.com/userfiles/image/file/memewizim.pdfIn PDF document text
- https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6e96d71f1---vepitawozapejigiruferud.pdfIn PDF document text
- https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/c0d891f3947762bfe5cd913f224486fd/zizavilezozewogidozixidaw.pdfIn PDF document text
- http://acsalma.hu/userfiles/files/bebekuwixajupagaganodiver.pdfIn PDF document text
- http://wonderful-foods.net/userfiles/file/2439175506.pdfIn PDF document text
- http://thesprotia.gr/uploads/file/siwepibowuvugufarevava.pdfIn PDF document text
- https://iranjobex.com/cache/fck_files/file/dixizoz.pdfIn PDF document text
- http://ser-buk.com/userfiles/file/2208321418.pdfIn PDF document text
- https://fsbulletsandbrass.com/userfiles/files/45407696737.pdfIn PDF document text
- http://chromoink.com/updates/file/98349099276.pdfIn PDF document text
- http://ankamet.com/userfiles/file/96747714307.pdfIn PDF document text
- http://franzoesischebulldoggen.eu/userfiles/file/62413182851.pdfIn PDF document text
- https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/4837f36ab188652c83ea99c37a457291/xasaxumoru.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=resonance+physics+formula+book+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_off0000c04e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC04E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d860.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD860	17680 bytes
SHA-256: `b8f2eceded5029d5b4789649868aff7544eb097bdb477dada6991ce8a43cb1d4`
`font_02_sfnt_off000106de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106DE	11276 bytes
SHA-256: `2c98e1ecd9cad223652a9b482ac0b94a45b6db7760e9b37d7d20c72499bd6078`

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