PDF malware analysis — malicious · 1eb1634463af8b50

MALICIOUS

PDF

89.2 KB Created: 2021-07-08 01:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 1cfe5f8229a1e9d0d1fda28aef041dd6 SHA-1: 54e4d9362dd0fcba2d8ac0e6fb488c663a7e5749 SHA-256: 1eb1634463af8b50e1ef1edbeebbc6f8d00af8dc1d54d6cf25ef1ef6fd0133df

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The numerous extracted URLs point to compromised websites, suggesting the PDF acts as a lure to redirect users to malicious content. The presence of external URI links and link farms on disposable hosting indicates a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 https://smidgel.ru/uplcv?utm_term=cut+from+pdf+online PDF link annotation
- https://coebmsf.com/userfiles/file/miwopisi.pdfIn PDF document text
- http://hoteldarim.ir/basefile/hoteldarimir/files/53732472450.pdfIn PDF document text
- https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d18131a722---fapoj.pdfIn PDF document text
- https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9f6ea11ec---50268438447.pdfIn PDF document text
- https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/5nr57joptev4nsg0mklu921iv8/vatibuju.pdfIn PDF document text
- https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988647d66df---waximapifovozoru.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f2ed7b986---24401431441.pdfIn PDF document text
- http://tajesink.com/Uploadfiles/files/58129888477.pdfIn PDF document text
- http://sghscsjamarai.org/guruhargobind/userfiles/file/gubifelese.pdfIn PDF document text
- http://rutherford58.com/clients/5/5b/5b2824e44de76337c32dfcbc3ee6dba3/File/xijus.pdfIn PDF document text
- http://diacritic.org/travel/app/webroot/img/files/zubasemenaxofoline.pdfIn PDF document text
- https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b46bb1a3bbd---69524231495.pdfIn PDF document text
- https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/fed8a2299d8630cacdf06cff4b43ecd8/34734447676.pdfIn PDF document text
- https://apz-arte.com/ckfinder/userfiles/files/sadafikugalurugul.pdfIn PDF document text
- https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/cce900ffe47168f77961e735218a919c/wuwisupifuj.pdfIn PDF document text
- http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/44660896459.pdfIn PDF document text
- http://staresecurity.com/userfiles/file/6862838985.pdfIn PDF document text
- http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607853eae928a---xupipipomefaneditisoku.pdfIn PDF document text
- https://jerseyshorepirates.com/userfiles/files/manelasatelarasomilise.pdfIn PDF document text
- http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b831e75b486---mimutivodifupaw.pdfIn PDF document text
- http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a09f641e61---53128910588.pdfIn PDF document text
- https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a60a0f7075e---mobunedu.pdfIn PDF document text
- http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd1c998423---gomovebezagi.pdfIn PDF document text
- https://atcotourismtravel.com/userfiles/file/bakobekibagalovoxag.pdfIn PDF document text
- http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/37608869374.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- 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_off0000f933.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF933	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011145.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11145	17824 bytes
SHA-256: `dc2e5b4cd0e142a5ed171861e897b6be7ad8fbe74762d5dc662a2dc893265003`
`font_02_sfnt_off00013fe6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13FE6	10460 bytes
SHA-256: `51ced0873d28233f0d2e57468c01bb63cc260ddee8a8a4ce9fa91461cc5327b1`

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