PDF malware analysis — malicious · 909b2356b34987f2

MALICIOUS

PDF

74.1 KB Created: 2021-03-15 15:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 3fc408a63d2998b5cbfccdbc6bea7482 SHA-1: c703639f50ce95e1e2fe81b327a7e1d901d7cf63 SHA-256: 909b2356b34987f2103d0e233af497901feebd6d77133b9bb4cccbcad9df3138

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous external links, including an invisible link to 'http://ig-supportcenter.xyz/joparirod4ec7k.pdf', and leverages disposable hosting, indicating a likely attempt to redirect users to malicious content. The presence of multiple suspicious URLs suggests a broad phishing campaign or a downloader for further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE

PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
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://vilenefex.ru/123?utm_term=bengali+comedy+drama+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4375908/normal_5ff7a9c5e7e06.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4378404/normal_60043bc3a186e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4453105/normal_5fcd70698a05c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4406223/normal_6023c9200b9cb.pdfIn PDF document text
- http://reduslimitalia-ufficiale.site/jaruwerapuwitewemiwazpp0jx.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413851/normal_5fe00f73bf616.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405185/normal_60226c7d3004d.pdfIn PDF document text
- http://vumoramoguko.22web.org/drastic_ds_emulator_apk_apkpure.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490127/normal_6032467a376fe.pdfIn PDF document text
- http://idealicaitaly-ufficiale.site/91796338775rdhl5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393208/normal_601fc737d9df2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370063/normal_60183af5ca004.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4425229/normal_600ff2dd995a8.pdfIn PDF document text
- http://ig-supportcenter.xyz/joparirod4ec7k.pdfIn PDF document text
- http://serodot.iblogger.org/que_son_los_almidones_modificados.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4378619/normal_5ffb2e117a087.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://vajubugi.epizy.com/jovorolat.pdfIn PDF document text
- https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_4bed5beb57dd468196d2ca108335b925.pdf?index=trueIn PDF document text
- https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_1ec7003d32f54b42ae234d886e5d6a31.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text
- http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
- http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cfd5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFD5	5448 bytes
SHA-256: `197d5bb02857552080588f1e1f9e09b0b4966cf4119a10df5a98c617b720fc5b`
`font_01_sfnt_off0000e251.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE251	6296 bytes
SHA-256: `7c633a58ad7bd438c39cc50f03419c652c89bd8bcb16952d26af751ccbccd51b`
`font_02_sfnt_off0000f671.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF671	10724 bytes
SHA-256: `ab625954d73d0c8e651f60e64f5ab20a52343d1185f94e52726b1da4be6b09ff`

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