PDF malware analysis — malicious · ad738dc6ce1486e4

MALICIOUS

PDF

82.7 KB Created: 2021-06-05 16:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 8b16c5948323ce3197b4da5d49b3c044 SHA-1: 2554dcbb8bc3f0a98e33d267a4c5dc41cc7756d1 SHA-256: ad738dc6ce1486e4869f675a89fba6f73c15a335cc66156b23d7d09bf0906dcd

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The embedded URL `https://cructi.ru/pbw?utm_term=que+es+resumen+ejecutivo+ejemplo` suggests a phishing lure related to executive summaries. While no scripts were extracted, the PDF structure and embedded URLs indicate a phishing attempt, likely delivered as an attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://cructi.ru/pbw?utm_term=que+es+resumen+ejecutivo+ejemplo PDF link annotation
- https://cdn-cms.f-static.net/uploads/4382617/normal_60326e41e59e8.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4473041/normal_60afe58a0d359.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4472793/normal_602ed6552f70b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490266/normal_6066b4fecc823.pdfIn PDF document text
- https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/53c6ef8.pdfIn PDF document text
- https://vobogokofudukig.weebly.com/uploads/1/3/0/7/130775751/5262654.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4472501/normal_602b5514223cf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470523/normal_605f72caceb53.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4469841/normal_6020392414ff3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4421778/normal_5ff86bc9f16d3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4474999/normal_5ffd7f53b4359.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://doxawadar.pbworks.com/w/file/fetch/144614622/kapapatabetekolevade.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b1c0316b-8038-476d-987f-1930eed8f92f/vabudakaxorupemotoba.pdfIn PDF document text
- http://mumubib.pbworks.com/f/51320434886.pdfIn PDF document text
- http://sozakuvepar.pbworks.com/w/file/fetch/144507636/75659076390.pdfIn PDF document text
- http://wojipag.pbworks.com/w/file/fetch/144659892/38819759150.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/968ff238-981f-4e9a-9f4c-90d9ef8030f9/qu_son_los_medicamentos_esteroides_y_para_que_se_utilizan.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/95682030-eb8a-4c7d-a565-98c791512517/21167204591.pdfIn PDF document text
- http://wojipag.pbworks.com/f/gelaterorevekunulev.pdfIn PDF document text
- http://ziduzobif.pbworks.com/f/hpq0004_driver_windows_7_32_bit.pdfIn PDF document text
- http://wepadigisita.pbworks.com/f/honeywell_th2110dv1008_pro_2000_programmable_thermostat_manual.pdfIn PDF document text
- http://wudiwiligis.pbworks.com/w/file/fetch/144547248/kejugixobosaluvisubid.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2cb36b5f-431b-4cf2-82f7-f72b4ef88995/49038482778.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f6f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6F3	4948 bytes
SHA-256: `06c45156a6032e44a2776ad7968409ca3bbdb677c36b26d03c47f9bb16845b10`
`font_01_sfnt_off000107bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107BF	11712 bytes
SHA-256: `30e06db56710eba7107fce9d8884e244896f9a0b972cc1165550a414912842d3`
`font_02_sfnt_off00012db3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12DB3	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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