PDF malware analysis — malicious · 5a3002660cc12f81

MALICIOUS

PDF

87.6 KB Created: 2021-09-28 05:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 5800765ecdf50d8a649cad544ab68afc SHA-1: 84a3f09b39cd0a0a0ec620e0b5bf7e6b15c8080f SHA-256: 5a3002660cc12f81df97f858e4522c09a990f7b5f046dad5104a0a608ca745d3

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a primary focus on directing users to `the embedded link The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` indicates the PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. ClamAV detection as `Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0` further confirms its malicious nature. No scripts were extracted, but the embedded URIs and link farm behavior strongly suggest a phishing or malware delivery attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.5176

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://drafthe.ru/uplcv?utm_term=waterdeep+dragon+heist+pdf+download PDF link annotation
- http://www.77ice.com/upload/files/lobirumezixewalurilixiru.pdfIn PDF document text
- http://fukaofoods.tw/uploads/files/202109040944377616.pdfIn PDF document text
- http://asliev.coco1490.com/upload/file_folder/file/91186802760.pdfIn PDF document text
- http://giprozdraw.ru/ckfinder/userfiles/files/xegigorararef.pdfIn PDF document text
- https://chezgregoire.fr/userfiles/xuxutidi.pdfIn PDF document text
- https://hondamienbac.vn/userfiles/file/xijekoguwovipoxipa.pdfIn PDF document text
- http://leadershipcareer.kr/fckeditor/_upload/file/pelumuwadesa.pdfIn PDF document text
- http://cerescommoditiesltd.com/Images_upload/files/30093676329.pdfIn PDF document text
- https://yarpaket.ru/userfiles/file/67161479445.pdfIn PDF document text
- http://hcm-invoice.vn/hinhanh_fckeditor/file/gikenosu.pdfIn PDF document text
- https://reitinguok.lt/userfiles/file/nujukupevasaluxusagi.pdfIn PDF document text
- http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161420c1ada10f---vixezorij.pdfIn PDF document text
- https://mt-creativestudio.com/ckfinder/userfiles/files/90474002892.pdfIn PDF document text
- https://relans-nn.ru/images/docs/file/29513305155.pdfIn PDF document text
- http://rm-centr.ru/uploads/file/zupejexarekoxezer.pdfIn PDF document text
- http://greenbiotech.vn/uploads/userfiles/file/torusulanomewerabu.pdfIn PDF document text
- http://incomsistema.ru/ckfinder/userfiles/files/12398300895.pdfIn PDF document text
- http://phupmirpol.pl/userfiles/file/sanuk.pdfIn PDF document text
- https://sogelec-eng.com/files/ckfinder/files/96215921877.pdfIn PDF document text
- https://tecnicadovolante.com/images/file/43129248348.pdfIn PDF document text
- http://www.rify.us/cms-uploads/files/rojitikobibenaki.pdfIn 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_off0000f3dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3DD	16420 bytes
SHA-256: `6a28e878f5b208644ca2d327d4a7eb04505a0dd19da000630f505553bc0ab115`
`font_01_sfnt_off00010aa0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AA0	10856 bytes
SHA-256: `d2f2b84e15d9946d634bf1b7279dbc0061e5c284313b3a4edf5276cc0cdef792`
`font_02_sfnt_off00012371.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12371	28108 bytes
SHA-256: `60b942a3c5df34703719d34e0d73d42b8021963d005caeee3ee96d4a61b7cd9f`

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