PDF malware analysis — malicious · 052bf2b34a27bf47

MALICIOUS

PDF

76.0 KB Created: 2021-06-08 22:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 4395218c2323ddea7c2527008234bece SHA-1: ae18d130dfa578f72dc805204d8bfa5926d61e2f SHA-256: 052bf2b34a27bf47617f4dc20449e970f9db3918d124843fbe2e782592b4f73b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URL 'https://chcial.ru/pbw?utm_term=waterdeep+dragon+heist+torrent' suggests a phishing or social engineering lure, likely attempting to trick users into downloading malware or visiting further malicious sites. No scripts were extracted, but the PDF structure and URL usage point towards a phishing attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://chcial.ru/pbw?utm_term=waterdeep+dragon+heist+torrent PDF link annotation
- https://cdn-cms.f-static.net/uploads/4490365/normal_606e3a58d0812.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366018/normal_5fe039ac856ee.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490523/normal_601d4ba2625a2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4478685/normal_6041e14502b52.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370278/normal_60572130755ec.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421629/normal_6018e7b70fedb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4384480/normal_5fcf0506e0037.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460946/normal_60bd8aa659e92.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://vomuseteweto.pbworks.com/w/file/fetch/144832662/el_rinoceronte_ionesco_resumen.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/50789f32-aff5-4230-8df8-628807203323/earth_stove_100_series_manual.pdfIn PDF document text
- http://nigezid.pbworks.com/w/file/fetch/144595068/55838283382.pdfIn PDF document text
- http://bulafiko.pbworks.com/f/what_is_the_criminal_justice_system_uk.pdfIn PDF document text
- http://zekodunu.pbworks.com/f/mixemonigir.pdfIn PDF document text
- http://gupiguna.pbworks.com/w/file/fetch/144805914/38226408815.pdfIn PDF document text
- http://zakikumese.pbworks.com/w/file/fetch/144717972/what_is_the_chemical_structure_of_steroids.pdfIn PDF document text
- http://padimagofo.pbworks.com/w/file/fetch/144453390/xudutalirobadoxokagewela.pdfIn PDF document text
- http://tusawijer.pbworks.com/f/how_to_find_duplicate_values_in_google_sheets.pdfIn PDF document text
- http://sujagajo.pbworks.com/w/file/fetch/144555870/80856448646.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9b6d22f2-e289-4678-a0f0-791a79ee7d21/xiwof.pdfIn PDF document text
- http://xuwedateredu.pbworks.com/w/file/fetch/144605646/procs_verbal_assemble_gnrale_constitutive_association_loi_1901.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e2b2e0db-61fc-43b8-a40f-78d6b4d7b6ed/the_giver_summary_chapter_10-11.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_off0000dd96.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD96	4988 bytes
SHA-256: `ccebfc5f8003e5125b59abf2ed99c05c006bd4f517573f03616d840083e8d60a`
`font_01_sfnt_off0000ee88.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE88	11264 bytes
SHA-256: `3c26f49c425164023999a838aba6fd0c3ea90cdfa4a007197c4a78ea8af1cab6`
`font_02_sfnt_off000114ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114BA	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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