PDF malware analysis — malicious · 3ef37153e023b2f0

MALICIOUS

PDF

78.5 KB Created: 2021-03-16 02:26:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02

MD5: 34b610cdd3715fbc022d0cc12dfb03bf SHA-1: b8fc7d47cd6a2eec2447f2d33dfb2cbf3635c413 SHA-256: 3ef37153e023b2f0d760b3493ee3c438d0cb3c003694e3b3e5bca007df3759f3

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The primary URL, 'https://ponafet.ru/strik?utm_term=how+to+reset+pioneer+receiver+vsx+531', is presented as a guide, likely to trick users into clicking and visiting a malicious site. No scripts were extracted, but the PDF structure and URL distribution strongly suggest a phishing or malware distribution campaign.

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://ponafet.ru/strik?utm_term=how+to+reset+pioneer+receiver+vsx+531 PDF link annotation
- https://tizojutatow.weebly.com/uploads/1/3/1/4/131406606/tatedineresu.pdfIn PDF document text
- https://lazarapo.weebly.com/uploads/1/3/4/5/134528324/257f9bb41b1f9.pdfIn PDF document text
- https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/xogemimiberu-gajefito-xudilaxerab.pdfIn PDF document text
- http://rawiduti.medianewsonline.com/manipulacion_genetica_libro.pdfIn PDF document text
- https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/bulefome-movobitudobugeg-jolarekow.pdfIn PDF document text
- https://mejatuwunuzawe.weebly.com/uploads/1/3/0/7/130775850/mekagir.pdfIn PDF document text
- https://kezikiwagoxarud.weebly.com/uploads/1/3/0/7/130739267/difajatupa.pdfIn PDF document text
- https://cdn.sqhk.co/lojosexotak/h1gf07T/8825279359.pdfIn PDF document text
- http://paselon.getenjoyment.net/sixulanikawimuverinesipo.pdfIn PDF document text
- https://fiwudarive.weebly.com/uploads/1/3/0/7/130775392/sasosanijuwoki-tuvatuxe-dajekatek-zunesekoju.pdfIn PDF document text
- https://cdn.sqhk.co/zurefaxenov/cijR4ie/gugosifovegiganujo.pdfIn PDF document text
- https://cdn.sqhk.co/porosobof/iM0viDU/zejexedumufemuvivamazag.pdfIn PDF document text
- http://vonoxafaku.scienceontheweb.net/atkins_physical_chemistry_solution_manual.pdfIn PDF document text
- http://xelibirujegid.mywebcommunity.org/tutorial_dreamweaver_8_bahasa_indonesia.pdfIn PDF document text
- http://fojegasojabur.22web.org/wimakiji.pdfIn PDF document text
- http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://guxenubegipus.epizy.com/66549878169.pdfIn PDF document text
- http://levasufut.rf.gd/needful_things_thrift_store_tucson_az.pdfIn PDF document text
- http://gosaduzunake.myartsonline.com/ge_profile_spacemaker_2.0_microwave_parts.pdfIn PDF document text
- http://wugerubuvugox.myartsonline.com/important_current_affairs_of_july_2020.pdfIn PDF document text
- http://novogizeboje.myartsonline.com/personal_pronouns_worksheet_grade_3.pdfIn PDF document text
- http://sabiwilurase.atwebpages.com/strength_training_schedule_at_home.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_off0000e6f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6F1	2276 bytes
SHA-256: `c997c106d37c208342e5db171307c157b29ab6ae85701e97f7759a5d4c6caf34`
`font_01_sfnt_off0000f15f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF15F	5208 bytes
SHA-256: `c2f1597e86877fd555f5f2dad6004323fad212859be30e23f024a83ccc43a4e1`
`font_02_sfnt_off0001034e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1034E	12284 bytes
SHA-256: `ef9504be8376ba677f52c771e41541a5d517041f1789b2b464057d70739f915b`

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