PDF malware analysis — malicious · 7fac9a0b08e400c2

MALICIOUS

PDF

75.8 KB Created: 2021-09-23 08:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 8ec9f099dd29a805bccbc25d0076bde2 SHA-1: d237f6e72cedf96ae0e50da3db04d51e99e8035f SHA-256: 7fac9a0b08e400c2009aca4ba6d929797dc869fd21f7e0dfbf785417e76bb98b

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1539 Steal Web Session Cookie

The sample was detected as a phishing PDF by ClamAV and ML classifiers. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials or session tokens by impersonating a login or MFA prompt. The embedded URLs point to various PDF files hosted on potentially disposable domains, suggesting a phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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
MFA / one-time-code harvesting lure high SE_MFA_LURE

Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
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 http://stressmanagement-karriere.de/userfiles/file/xutobax.pdf In PDF document text
- http://kiapelhrimov.cz/UserFiles/File/vubifebopimol.pdfIn PDF document text
- https://ciela13.leaddeehub.com/userfiles/files/40795649393.pdfIn PDF document text
- http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/78727638556.pdfIn PDF document text
- https://zegaoyun.com/calisma2/files/uploads/wevopawugapije.pdfIn PDF document text
- https://iqrainternationalschool.org/_assets/files/8039293722.pdfIn PDF document text
- https://ferado.vn/userfiles/file/xixenusu.pdfIn PDF document text
- http://floralojistik.com/userfiles/file/jokuzajuninexizoza.pdfIn PDF document text
- http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/lapugegukofozupiwodog.pdfIn PDF document text
- http://allineers.morefriendship.com/upload/files/74392661322.pdfIn PDF document text
- http://paolacaone.eu/userfiles/files/wusesul.pdfIn PDF document text
- http://abwgulfport.com/uploads/files/dotupiku.pdfIn PDF document text
- http://illinoislivestock.org/userfiles/file/78861240455.pdfIn PDF document text
- http://manegedebuitenwijck.nl/uploads/file/netadituxagexores.pdfIn PDF document text
- https://korvioinfotech.com/ckfinder/userfiles/files/bubofagiritur.pdfIn PDF document text
- https://ms1oke.com/contents/files/daxoxogubuseda.pdfIn PDF document text
- https://alistairmills.com/ckfinder/userfiles/files/kujebavidevax.pdfIn PDF document text
- http://kstarsmall.net/userfiles/file///dujoxutunaxawipidovet.pdfIn PDF document text
- https://cplastik.com/data/cms/file/jatos.pdfIn PDF document text
- http://bajkolandia-leszno.pl/userfiles/file/54868333508.pdfIn PDF document text
- http://auxerretv.com/content/public/file/purasorojiwuxozesitaseveg.pdfIn PDF document text
- http://autosoftware.company/autoresponders_images/files/95180175606.pdfIn PDF document text
- http://kondicionery-dzerzhinskij.ru/upload_picture/file/wiwotofafuwolegegu.pdfIn PDF document text
- https://fultoys.com/userfiles/65993488479.pdfIn PDF document text
- http://gorisum.net/fckeditor/upload_file/file/gonotofemuguwemir.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=log+on+hotmailPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c6a1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6A1	10112 bytes
SHA-256: `86893c979ff835509e4dcb93574846f345ad2a2abc530b973ff162d380fea10b`
`font_01_sfnt_off0000dce3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCE3	17496 bytes
SHA-256: `60f734cd7d06fd9c2eb8ae3cff6ca67dd4e43972e00c3b1049dfcc4c4f5908e0`
`font_02_sfnt_off000109f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109F0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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