PDF malware analysis — malicious · fd7f6f5f0dce965a

MALICIOUS

PDF

77.4 KB Created: 2021-02-07 19:55:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 307b82c3dcb1e8e7012634b12ce626d8 SHA-1: c90e50e07a842661d12703296b3709cb577fce1d SHA-256: fd7f6f5f0dce965a3a90e56dc4fc890a615afc675b3093fd80e4a51cdb27be4f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous external URLs, with one prominent URL pointing to 'jacksth.ru' which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to product names and application details, suggesting a lure to disguise the malicious intent. No scripts were extracted, but the PDF structure and external links indicate a phishing attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/123?utm_term=leupold+vx-2+4-12x40mm+adjustable+objective PDF link annotation
- https://cdn-cms.f-static.net/uploads/4467561/normal_5fd9682435db5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4408170/normal_5feb0fde41391.pdfIn PDF document text
- http://carbackseat.site/tropismo_y_taxismolli3q.pdfIn PDF document text
- http://air-calm2.club/deputukezumujonixugelukls4m.pdfIn PDF document text
- https://novebeze.weebly.com/uploads/1/3/3/9/133997241/9327606.pdfIn PDF document text
- http://winoorama.space/mogudipovevukowoxaxuln5vj.pdfIn PDF document text
- http://esagafow.fun/cities_skylines_ps4_modsf5s56.pdfIn PDF document text
- https://wesuzijuto.weebly.com/uploads/1/3/0/7/130740493/3bdd77cf8002.pdfIn PDF document text
- http://bas-vorota.ru/amazon_photos_apple_tvun1vl.pdfIn PDF document text
- https://gavozosalaz.weebly.com/uploads/1/3/1/1/131163920/fanavowewidit.pdfIn PDF document text
- http://shortsomfj.space/solar_system_planets_distance_from_the_sunjb1r5.pdfIn PDF document text
- https://dibasipelop.weebly.com/uploads/1/3/0/7/130738559/forejoronu.pdfIn PDF document text
- https://nesurufaratetud.weebly.com/uploads/1/3/1/4/131408203/potoburi_dibokises.pdfIn PDF document text
- http://pagebake.com/distancia_maxima_entre_registros_sanitarios1wr0i.pdfIn PDF document text
- https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/525e0bd5c62.pdfIn PDF document text
- http://bigowet.xyz/brisbane_tv_guide_rugby_world_cupr57g5.pdfIn PDF document text
- http://anbieterbewertung-autoscoutch.com/attribute_changer_portableykcyb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4410703/normal_5fe127cf1e29f.pdfIn PDF document text
- https://gofupadosu.weebly.com/uploads/1/3/4/8/134853885/donanow_gasitosusewejet_sagoj.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
- https://s3.amazonaws.com/purufiz/fizubuduxekofex.pdfIn PDF document text
- https://s3.amazonaws.com/safenalavojuwu/68212813707.pdfIn PDF document text
- https://s3.amazonaws.com/jasadavebaga/70628595552.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_off0000e067.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE067	5632 bytes
SHA-256: `3c912c97c72de0f52c5ddbcba087de101815156db23316d695ce8bc45317df47`
`font_01_sfnt_off0000f3bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3BB	11172 bytes
SHA-256: `d6888790bfcc43c08470863a3cc2c1987e16cdcbbe46ddf9df8bdcddd761e5a8`
`font_02_sfnt_off000119c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119C2	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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