PDF malware analysis — malicious · d29aec757fe8305a

MALICIOUS

PDF

89.0 KB Created: 2021-09-19 20:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 2ca7f35bd040265c6ab86718456f65c2 SHA-1: 6d009d3b47b6abe9a269ca1f66a097d131187a00 SHA-256: d29aec757fe8305a975dba2e28d0965386cd77e5ff082a75dac2b931e2cc9b72

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The presence of external URIs and the link farm heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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
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://crysiq.ru/uplcv?utm_term=watch+movie+streaming PDF link annotation
- https://proxus.nl/file/vulebuwasevor.pdfIn PDF document text
- https://www.assofmt.org/ckfinder/userfiles/files/38390171452.pdfIn PDF document text
- http://upoart.com/ckfinder/userfiles/files/8660088521.pdfIn PDF document text
- http://gyuco.com/uploadfile/files/20210918_065520.pdfIn PDF document text
- https://minhvuongthuphap.com/upload/ck/files/xilopofawupu.pdfIn PDF document text
- http://perchegouet.com/ckfinder/userfiles/files/67624285153.pdfIn PDF document text
- https://branchennachweis.eu/userfiles/file/xibukevifuwedun.pdfIn PDF document text
- http://hongsung114.com/files/fckeditor/file/zaxuwusubasekevavop.pdfIn PDF document text
- http://g-shocktou.com/user_file/file/83104277918.pdfIn PDF document text
- http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f40771601---95613841310.pdfIn PDF document text
- https://wonwon.taipei/photo/file/7676478274.pdfIn PDF document text
- http://tsyrulnikov.ru/upload/file/molomitoxubibisu.pdfIn PDF document text
- http://zagazzo.com/userfiles/file/gebesedawawireziwotu.pdfIn PDF document text
- http://lnv-cnc.gr/userfiles/file/zajezani.pdfIn PDF document text
- http://svsteinfurth.de/radsportfiles/file/rejefekex.pdfIn PDF document text
- http://techmechengineers.com/uploads/32758547779.pdfIn PDF document text
- https://fablab808.com/nbloom/fckuploads/file/furikavapelikegidexofowi.pdfIn PDF document text
- http://ytlcases.com/userfiles/file/89912350377.pdfIn PDF document text
- http://fundacjahfg.pl/upload/file/xevipix.pdfIn PDF document text
- http://uniquehotelsolutions.com/files/others/42753112170.pdfIn PDF document text
- http://d-a-s.cn/userfiles/file/82922343480.pdfIn PDF document text
- http://stefanourso.com/public/userfiles/file/bufamomavazarelifema.pdfIn PDF document text
- http://hospitalityroyal.com/upload_files/file/64697293038.pdfIn PDF document text
- https://paron-rebondir.com/uploads/files/bukibimuropak.pdfIn PDF document text
- http://kopdesign.nl/userfiles/file/giviloxog.pdfIn PDF document text
- https://shunnasato.com/72136736838.pdfIn PDF document text
- https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145e5ead2790---xubimotisonus.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_off0000f826.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF826	10692 bytes
SHA-256: `453c86ed7e11f57065edd08ee2fd029c4547c843785a03bc525e314a1a829acc`
`font_01_sfnt_off00011093.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11093	17720 bytes
SHA-256: `1cbe29d8721ab2f8891b07dcd85873699895e6b6b430002a311bb0eb17e07792`
`font_02_sfnt_off00013e9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E9D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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