PDF malware analysis — malicious · 348684b6b92f091b

MALICIOUS

PDF

93.8 KB Created: 2021-09-08 11:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 7b9479484d6a844608b802e22991dab7 SHA-1: e42b26729fdb3a03c462ffee24c5c712dd210949 SHA-256: 348684b6b92f091bfa2dd121175a6eb5969941a0cae7907927dd8712f702b20b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan-like behavior associated with these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9528

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://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/880e88a16f4e29b7dcdfa1bc51079555/26263657465.pdf In PDF document text
- http://www.blueoak.fr/image/file/zinodevobujepiva.pdfIn PDF document text
- http://prmakeup.com/Image/files/kaledipawumizodefawugefi.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/6eac7ec172c3fe3514435871b0681d18/tujajebirovoguzulijenelid.pdfIn PDF document text
- http://raczcsalad.hu/files/zipalinijenukapufafi.pdfIn PDF document text
- http://eg-connect.com/uploads/editorfiles/file///mitena.pdfIn PDF document text
- https://www.aaptuk.org/ckfinder/userfiles/files/73163746380.pdfIn PDF document text
- https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/95fcb47b2b685bb2bc208dc6be1e9b4c/18511933875.pdfIn PDF document text
- https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/715eee9ec3e74f4f69606831450bd958/zozegowejujenusofinirob.pdfIn PDF document text
- http://cellesekorea.com/ckupload/files/99476873850.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/9r96magj0s1eudlst62a1pehm7/wulijetotiniralifezizuro.pdfIn PDF document text
- https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613724c9d87de---95349624294.pdfIn PDF document text
- http://shsuorui.com/uploadfiles/fckeditor/20210821/file/16295001803509.pdfIn PDF document text
- https://coonvalleycc.com/userfiles/file/65291397677.pdfIn PDF document text
- http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/73195832895.pdfIn PDF document text
- http://dogomanhnghia.com/uploads/files/sifelawaxofenibami.pdfIn PDF document text
- http://bearings-home.com/userfiles/file/sezeko.pdfIn PDF document text
- http://northcity.rs/slike/files/musuxujijujinobiv.pdfIn PDF document text
- https://medtek.vn/storage/file/50284520880.pdfIn PDF document text
- https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160941101ba251---3117163209.pdfIn PDF document text
- https://ikima.fr/uploads/file/turupedamag.pdfIn PDF document text
- http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/65388104073.pdfIn PDF document text
- https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/6aff37f52fd4b426ba1af303f147c940/5433501209.pdfIn PDF document text
- https://pypconsultores.mx/userfiles/file/goxegoxerefiwogo.pdfIn PDF document text
- https://iwanbim.com/userfiles/files/nojosabadegasedupovad.pdfIn PDF document text
- http://ugrctrani.it/userfiles/files/18289394361.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=manual+labour+bengali+meaningPDF link annotation
- 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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off0000d591.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xD591	16580 bytes
SHA-256: `1157861987a488e8c92d3514a4e24d5423860622896d3417b9b1b7ab8e6b88a3`
`font_01_sfnt_off0000ecf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECF3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001050a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1050A	10420 bytes
SHA-256: `b7f6e92b66cd0d15dd432889bb3f6fab00650023ccd70e86a41764b1a9ad6060`
`font_03_sfnt_off00011c82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C82	1680 bytes
SHA-256: `6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc`
`font_04_sfnt_off0001247a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1247A	26116 bytes
SHA-256: `d3e0c6427348758887180ac7068607d0a4f84d73d8850410bd57d481952b1243`

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