PDF malware analysis — malicious · 8015f6721bc66f1d

MALICIOUS

PDF

90.3 KB Created: 2021-09-22 19:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 9eb8a0170b45a3ed303a1fc2eb153fc2 SHA-1: 0830a699590d31d2e16bf1f31f48108612e02d26 SHA-256: 8015f6721bc66f1d5cbec7d73be50e379d2b6df0fe8e6da9d4d811a1704bc0ec

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external URIs and link farm patterns, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards the use of JavaScript for malicious redirection or exploitation, aligning with T1059.007.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://ketchas.ru/uplcv?utm_term=strip+poker+apk+android PDF link annotation
- https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/ce96cd32e304487b0d4865e0f8f5be00/lojixuxakivujuxal.pdfIn PDF document text
- http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/1c83cc1b65aac3697a575dd182b7e014/41631008037.pdfIn PDF document text
- http://originalbau.hu/imagesfiles/28461822441.pdfIn PDF document text
- http://modnyi-buket.ru/uploads/files/7481060985.pdfIn PDF document text
- http://yevres.fr/ckfinder/userfiles/files/topamirizujutopewelanis.pdfIn PDF document text
- https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/99274710722.pdfIn PDF document text
- http://themadthinker.com/temp/vinney/HTML/userfiles/file/devinenufimedebi.pdfIn PDF document text
- https://bwhe.in/ckfinder/userfiles/files/jitiku.pdfIn PDF document text
- http://taaltoetsvo.nl/userfiles/file/bizofesamijodimawiriguv.pdfIn PDF document text
- http://hamzalegalservices.com/userfiles/file/dodetiti.pdfIn PDF document text
- https://spotiverify.com/ci/userfiles/files/dedude.pdfIn PDF document text
- http://tecniagua.es/uploads/ckfinder/files/sekepigogukujetujineredud.pdfIn PDF document text
- http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/jivavuxuvewa.pdfIn PDF document text
- http://edilcfcostruzioni.com/userfiles/files/mezujomujaregedema.pdfIn PDF document text
- http://www.pratikchoudhury.com/fckimages/file/57845419175.pdfIn PDF document text
- https://mytshirtcreator.com/app/webroot/files/file/notada.pdfIn PDF document text
- http://punaide.com/userfiles/files/91844354347.pdfIn PDF document text
- http://bananamusic.tw/uploads/files/202109052125034148.pdfIn PDF document text
- https://marwaservicecenter.com/nbloom/fckuploads/file/wajuvedub.pdfIn PDF document text
- http://yjccnc.com/upload/files/lagesagesi.pdfIn PDF document text
- https://orsam.org.tr/paketler/ckfinder/dosyalar/files/24373722850.pdfIn PDF document text
- http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23951352451.pdfIn PDF document text
- https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/b0960483b27e81d75a81d01f28a8e0da/regagipozajakesab.pdfIn PDF document text
- http://meijialx.com/ckfinder/userfiles/files/88833364722.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd9b6d2534---24759692927.pdfIn PDF document text
- https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/161434dbcda02c---kabagulukoduguzewafa.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_off0000f388.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF388	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010b9a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B9A	21512 bytes
SHA-256: `ab48012b28252a7a863d09f0d61e1cf5615fac7b32d83cc8a57627a5a1d45c5b`
`font_02_sfnt_off00014467.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14467	10336 bytes
SHA-256: `e3bbc4990a1bfa693943fc85aa7188fea45d0d87cbed5d507627ab83e4815fe2`

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